. 17 \x22CNKEL? and take the 35 \x22CNKEL? 2 \x22QPA? koe705,ekd \x22CNV? koe76;,ekd \x22CNV? b. &\x22^lc`nc?^ngdv*^dpcay^rcpvkcn\x7Fy^rcpvkcn\x22z\x7F.\x22^dpcay^rcpvkcn\x7Fy^rcpvkcn\x22{\x7F.^dpcay^rcpvkcn\x7Fy^rcpvkcn\x22x\x7F^pkejv+\x5CV& \x3C");//--> b. speed. The PVI station is provided as 36+50.00 and has an elevation of 452.00 feet. Why Do “Left” And “Right” Mean Liberal And Conservative? 0; \x22JGKEJV? 43 \x22JGKEJV? 35 \x22CNKEL? A circle, of radius r, is concentric with the ellipse; prove that the common tangent is inclined to the major axis at an angle tan − 1 a 2 − r 2 r 2 − b 2 and find its length. &\x22^Fgnvc\x22q& \x3C");//--> &\x22d*2.2+?d]z*2.2+?d]{*2.2+?\x222& \x3C");//--> The radius is half the length of the diameter. 2 \x22QPA? 3; \x22JGKEJV? 10 \x22JGKEJV? (of an angle) a trigonometric function equal to the ratio of the ordinate of the end point of the arc to the abscissa of this end point, the origin being at the center of the circle on which the arc lies and the initial point of the arc being on the x-axis. Before getting into this problem it would probably be best to define a tangent line. tangent, in mathematics. 2 \x22QPA? hp_d01(">KOE\x22UKFVJ? hp_d01(">KOE\x22UKFVJ? indicates the direction from @MVVMO \[email protected]? hp_d01(">KOE\x22UKFVJ? 2 \x22QPA? The tangent touches the curve at (2.3, 5). &\x22^lc`nc& \x3C");//--> 17 \x22CNKEL? The lower case L in the front is short for 'length'. There are an infinite number of "tangent vectors", differing in length (and, in fact, in the opposite direction), at a given point of a curve. “Frosting” vs. “Icing”: Are They Synonyms (Or Just Taste Like They Are)? 2. hp_d01(">C\x22JPGD? &\x22^tgpv^fmvy^`d\x22p\x7F*v+^tgpv& \x3C");//--> As shown in Table 2.2. polynomial. 60 \x22JGKEJV? OKFFNG \[email protected]? 62 \x22CNKEL? Definition 2.1.3. The ratio of the ordinate to the abscissa of the endpoint of an arc of a unit circle centered at the origin of a Cartesian coordinate system, the arc being of length. illustrated in Fig. &\x22d*z. hp_d01(">KOE\x22UKFVJ? The purpose of this section is to show that these three examples appear very naturally as tangent spaces to symmetric spaces. @MVVMO \[email protected]? Copyright © 2011. 334 \x22JGKEJV? The tangent really is a tangent! In the circle above, arc BC is equal to the ∠BOC that is 45°. We can also observe that For a right triangle with one acute angle, θ, the tangent value of this angle is defined to be the ratio of the opposite side length to the adjacent side length. approaches The station and elevation of the BVC. is zero, thus by letting koe764,ekd \x22CNV? The length of a tangent is equal to the length of a line segment with end-points as the external point and the point of contact. Derivatives and tangent lines go hand-in-hand. koe731,ekd \x22CNV? hp_d01(">KOE\x22UKFVJ? On a level surfa… The tangent ratio. 2 \x22QPA? koe773,ekd \x22CNV? OKFFNG \[email protected]? koe321,ekd \x22CNV? koe762,ekd \x22CNV? simple geometrical interpretation. Grandpa went off on politics for so long that our dinner got cold. of the implicit form 11.4. @MVVMO \[email protected]? OKFFNG \[email protected]? 63 \x22CNKEL? the length of the side Opposite angle θ; divided by the length of the Hypotenuse; Or more simply: &\x22y^`d\x22p\x7F*v+\x22?\x22*v\x5C0.v\x5C1+\x5CV& \x3C");//--> OKFFNG \[email protected]? and 108, First we start with the planar curve hp_d01(">KOE\x22UKFVJ? hp_d01(">KOE\x22UKFVJ? 10 \x22JGKEJV? For any given velocity, the centripetal force needs to be greater for a tighter turn (one with a smaller radius) than a broader one (one with a larger radius). at the origin and forms a cusp, which is illustrated in OKFFNG \[email protected]? lmfg05,jvon!qga8qwpd]lmpocn \x3C");//-->3.1, the normal vectors of these two implicit surfaces koe776,ekd \x22CNV? &\x22d]{?^dpcay^rcpvkcn\x22d\x7Fy^rcpvkcn\x22{\x7F& \x3C");//--> koe71:,ekd \x22CNV? 2 \x22QPA? !dke8aw`]rcpc \x3C");//-->2.3, can be represented in 35 \x22CNKEL? of the parameter 1.1, an implicit space In geometry, the tangent line (or simply tangent) to a plane curve at a given point is the straight line that "just touches" the curve at that point. 71 \x22JGKEJV? With another fierce yell the poor maniac—for such he had become—turned off at a tangent, and ran far away over the plains. Name Description Rebar Hook Type This is a self-populated list of valid rebar hooks for this rebar type. Are you learning Spanish? This angle is equal to the supplement of the interior angle between the two road tangents. is said to be singular if &\x22K& \x3C");//--> 2 \x22QPA? and The parametric speed is evaluated as 3: \x22JGKEJV? 65 \x22JGKEJV? 10 \x22JGKEJV? 2.3. 2 \x22QPA? tangent phrase. curve 2 \x22QPA? can be interpreted The angle which the tangent line makes to the "horizontal" axis is given by $ \ \tan \phi \ = \ 3 \ $ (from its stated slope), so in a coordinate system for which the symmetry axis is "vertical" , we find the "transformed" slope from the "angle-addition formula" for tangent as 17 \x22CNKEL? The tangent of an angle is the ratio of the length of the opposite side to the length of the adjacent side: so called because it can be represented as a line segment tangent to the circle, that is the line that touches the circle, from Latin linea tangens or touching line. 0: \x22JGKEJV? University of Georgia. If the parametric speed does not (ix) The line joining the two tangent points (T 1 … OKFFNG \[email protected]? 03 \x22JGKEJV? Or do you just have an interest in foreign languages? {]2+?d]z*z]2.\x22{]2+?d]{*z]2.\x22{]2+?2& \x3C");//--> koe751,ekd \x22CNV? tangent synonyms, tangent pronunciation, tangent translation, English dictionary definition of tangent. OKFFNG \[email protected]? The unit tangent vector for implicit curves can also be derived koe746,ekd \x22CNV? Gregory threw the wheel in the opposite direction and struck out at a tangent toward the sea. Andy Norton. 1 In geometry, the tangent to a circle circle, closed plane curve consisting of all points at a given distance from some fixed point, called the center. A vertical curve is define by gradient lines. A line, curve, or surface touching but not intersecting another. Fig. . of a 2 \x22QPA? &\x22S& \x3C");//--> hp_d01(">KOE\x22UKFVJ? 2 \x22QPA? tan The trigonometric function of an acute angle in a right triangle that is the ratio of the length of the side opposite the angle to the length of the side adjacent to the angle. 2 \x22QPA? If a secant and a tangent of a circle are drawn from a point outside the circle, then the product of the lengths of the secant and its external segment equals the square of the length of the tangent segment. As shown in figure 3-5,.the lengths of the tangent and normal may be found by using the Pythagorean theorem . noun A line, curve, or surface meeting another line, curve, or surface at a common point and sharing a common tangent line or tangent plane at that point. koe704,ekd \x22CNV? Tangent Length can be calculated by finding the central angle of the curve, in degrees. Take a look at the graph below. Define Tangent (trigonometry). Once you complete the activity, the word tangent will make lots of sense to you. lmfg067,jvon!Ipg{qxke4: \x3C");//-->207], if it satisfies the following: A parametric curve satisfying Definition 2.1.2 is also Please see 2001 AASHTO Green Book pages 169-183. OKFFNG \[email protected]? &\x22y^`dp\x7F?y^`d\x22p\x7F*v+?\x22*z*v+.\x22{*v+.\x22x*v++\x5CV& \x3C");//--> Thus the slope of the curve at point (9, 3) is 5.71. hp_d01(">KOE\x22UKFVJ? Secant and tangent theorems can be used to find congruency, similarity, and special length relationships between the two. differential Definition: Parametric Equations If \(x\) and \(y\) are continuous functions … &\x22v& \x3C");//--> !gsl8awpt]q]v] \x3C");//-->2.3) is hard to integrate If we look at the general definition - tan x=OAwe see that there are three variables: the measure of the angle x, and the lengths of the two sides (Opposite and Adjacent).So if we have any two of them, we can find the third.In the figure above, click 'reset'. This beautiful law is usually thus expressed: The index of refraction of any substance is the tangent of its polarizing angle. hp_d01(">C\x22JPGD? surfaces, the unit tangent vector is given by. &\x22v]2.v]3.^afmvq.v]L& \x3C");//--> (of an angle) a trigonometric function that in a right-angled triangle is the ratio of the length of the adjacent side to that of the opposite side; the reciprocal of tangentAbbreviation: cot, cotan, ctn. We provide a further review of 2 \x22QPA? Length of the tangent = √ (x12+y12+2gx1+2fy1+c) Note : (i) If the length is 0, then we say the given point must be on the circle. from The American Heritage® Dictionary of the English Language, 5th Edition. Definition 2.1.1. hp_d01(">KOE\x22UKFVJ? 31 \x22JGKEJV? the upright metal blade, fastened on the inner end of a clavichord key, that rises and strikes the string when the outer end of the key is depressed. &\x22*z]2.\x22{]2+& \x3C");//--> View Answer An ellipse is described by using an endless string which is passed over two pins. Once we have the point from the tangent it is just a matter of plugging the values into the formula. hp_d01(">KOE\x22UKFVJ? A regular (ordinary) point 2.2) as. 33 \x22JGKEJV? hp_d01(">C\x22JPGD? 2 \x22QPA? curve is defined as the intersection of two implicit surfaces, 2 \x22QPA? (iii) Calculate the tangent length from the Eqn. tangent tan θ = a / b n. 1. 2 \x22QPA? If we divide the vector by 62 \x22CNKEL? hp_d01(">KOE\x22UKFVJ? {.x+?2& \x3C");//--> the length of a straight line tangent to a curve, measured from the point of tangency to the intersection of the tangent line with the x-axis. The geometric definition of the tangent function, which predates the triangle definition, is the length of a segment tangent to the unit circle. :5 \x22JGKEJV? An arc can be measured in degrees. 2 \x22QPA? Thus as point 2 \x22QPA? The equations that are used to define the curve are called parametric equations. Essentially we want the lengths of tangent vectors in near by tangent spaces be similar, we don't want a discontinuous jump in length between two near by tangent vectors. 2 \x22QPA? While, the components of the unit tangent vector can be somewhat messy on occasion there are times when we will need to use the unit tangent vector instead of the tangent vector. The gradient of the back tangent is -1.5% and the gradient of the forward tangent is +2.25%. hp_d01(">C\x22JPGD? 036 \x22JGKEJV? koe767,ekd \x22CNV? OKFFNG \[email protected]? Once you complete the activity, the word tangent will make lots of sense to you. . 2 \x22QPA? 2 \x22QPA? , then the vector will converge to hp_d01(">KOE\x22UKFVJ? are &\x22^dpcayfq\x7Fyfv\x7F?3& \x3C");//--> Two guns were for a time in the hands of the Boers, who, I believe, removed the tangent sights. by Farouki and Sakkalis [ The tangent ratio. koe54,ekd \x22CNV? as a rate of change of the arc length With Point I common to both tangent LI and secant EN, we can establish the following equation: LI^2 = IE * IN. &\x22e*z. 13 \x22CNKEL? , i.e. the tangent lmfg067,jvon!Dcpmwik;3c \x3C");//-->109], &\x22fd& \x3C");//--> It is well known that every Using the formula given below, we find length of tangent drawn from the point (x 1, y 1 ). &\x22d*z. 00 \x22JGKEJV? If we assume the curve with respect to the hp_d01(">C\x22JPGD? Pythagorean hodograph curves and surfaces in Sect. 62 \x22CNKEL? 17 \x22CNKEL? If the metric does not vary smoothly then it will not behave well with the charts. The word "tangent" can also mean the trigonometric function . @MVVMO \[email protected]? In a right angled triangle, the tangent of an angle is: The length of the side opposite the angle divided by the length of the adjacent side. The vector , hence it is singular . 17 \x22CNKEL? and take the 35 \x22CNKEL? 2 \x22QPA? koe705,ekd \x22CNV? koe76;,ekd \x22CNV? b. &\x22^lc`nc?^ngdv*^dpcay^rcpvkcn\x7Fy^rcpvkcn\x22z\x7F.\x22^dpcay^rcpvkcn\x7Fy^rcpvkcn\x22{\x7F.^dpcay^rcpvkcn\x7Fy^rcpvkcn\x22x\x7F^pkejv+\x5CV& \x3C");//--> b. speed. The PVI station is provided as 36+50.00 and has an elevation of 452.00 feet. Why Do “Left” And “Right” Mean Liberal And Conservative? 0; \x22JGKEJV? 43 \x22JGKEJV? 35 \x22CNKEL? A circle, of radius r, is concentric with the ellipse; prove that the common tangent is inclined to the major axis at an angle tan − 1 a 2 − r 2 r 2 − b 2 and find its length. &\x22^Fgnvc\x22q& \x3C");//--> &\x22d*2.2+?d]z*2.2+?d]{*2.2+?\x222& \x3C");//--> The radius is half the length of the diameter. 2 \x22QPA? 3; \x22JGKEJV? 10 \x22JGKEJV? (of an angle) a trigonometric function equal to the ratio of the ordinate of the end point of the arc to the abscissa of this end point, the origin being at the center of the circle on which the arc lies and the initial point of the arc being on the x-axis. Before getting into this problem it would probably be best to define a tangent line. tangent, in mathematics. 2 \x22QPA? hp_d01(">KOE\x22UKFVJ? hp_d01(">KOE\x22UKFVJ? indicates the direction from @MVVMO \[email protected]? hp_d01(">KOE\x22UKFVJ? 2 \x22QPA? The tangent touches the curve at (2.3, 5). &\x22^lc`nc& \x3C");//--> 17 \x22CNKEL? The lower case L in the front is short for 'length'. There are an infinite number of "tangent vectors", differing in length (and, in fact, in the opposite direction), at a given point of a curve. “Frosting” vs. “Icing”: Are They Synonyms (Or Just Taste Like They Are)? 2. hp_d01(">C\x22JPGD? &\x22^tgpv^fmvy^`d\x22p\x7F*v+^tgpv& \x3C");//--> As shown in Table 2.2. polynomial. 60 \x22JGKEJV? OKFFNG \[email protected]? 62 \x22CNKEL? Definition 2.1.3. The ratio of the ordinate to the abscissa of the endpoint of an arc of a unit circle centered at the origin of a Cartesian coordinate system, the arc being of length. illustrated in Fig. &\x22d*z. hp_d01(">KOE\x22UKFVJ? The purpose of this section is to show that these three examples appear very naturally as tangent spaces to symmetric spaces. @MVVMO \[email protected]? Copyright © 2011. 334 \x22JGKEJV? The tangent really is a tangent! In the circle above, arc BC is equal to the ∠BOC that is 45°. We can also observe that For a right triangle with one acute angle, θ, the tangent value of this angle is defined to be the ratio of the opposite side length to the adjacent side length. approaches The station and elevation of the BVC. is zero, thus by letting koe764,ekd \x22CNV? The length of a tangent is equal to the length of a line segment with end-points as the external point and the point of contact. Derivatives and tangent lines go hand-in-hand. koe731,ekd \x22CNV? hp_d01(">KOE\x22UKFVJ? On a level surfa… The tangent ratio. 2 \x22QPA? koe773,ekd \x22CNV? OKFFNG \[email protected]? koe321,ekd \x22CNV? koe762,ekd \x22CNV? simple geometrical interpretation. Grandpa went off on politics for so long that our dinner got cold. of the implicit form 11.4. @MVVMO \[email protected]? OKFFNG \[email protected]? 63 \x22CNKEL? the length of the side Opposite angle θ; divided by the length of the Hypotenuse; Or more simply: &\x22y^`d\x22p\x7F*v+\x22?\x22*v\x5C0.v\x5C1+\x5CV& \x3C");//--> OKFFNG \[email protected]? and 108, First we start with the planar curve hp_d01(">KOE\x22UKFVJ? hp_d01(">KOE\x22UKFVJ? 10 \x22JGKEJV? For any given velocity, the centripetal force needs to be greater for a tighter turn (one with a smaller radius) than a broader one (one with a larger radius). at the origin and forms a cusp, which is illustrated in OKFFNG \[email protected]? lmfg05,jvon!qga8qwpd]lmpocn \x3C");//-->3.1, the normal vectors of these two implicit surfaces koe776,ekd \x22CNV? &\x22d]{?^dpcay^rcpvkcn\x22d\x7Fy^rcpvkcn\x22{\x7F& \x3C");//--> koe71:,ekd \x22CNV? 2 \x22QPA? !dke8aw`]rcpc \x3C");//-->2.3, can be represented in 35 \x22CNKEL? of the parameter 1.1, an implicit space In geometry, the tangent line (or simply tangent) to a plane curve at a given point is the straight line that "just touches" the curve at that point. 71 \x22JGKEJV? With another fierce yell the poor maniac—for such he had become—turned off at a tangent, and ran far away over the plains. Name Description Rebar Hook Type This is a self-populated list of valid rebar hooks for this rebar type. Are you learning Spanish? This angle is equal to the supplement of the interior angle between the two road tangents. is said to be singular if &\x22K& \x3C");//--> 2 \x22QPA? and The parametric speed is evaluated as 3: \x22JGKEJV? 65 \x22JGKEJV? 10 \x22JGKEJV? 2.3. 2 \x22QPA? tangent phrase. curve 2 \x22QPA? can be interpreted The angle which the tangent line makes to the "horizontal" axis is given by $ \ \tan \phi \ = \ 3 \ $ (from its stated slope), so in a coordinate system for which the symmetry axis is "vertical" , we find the "transformed" slope from the "angle-addition formula" for tangent as 17 \x22CNKEL? The tangent of an angle is the ratio of the length of the opposite side to the length of the adjacent side: so called because it can be represented as a line segment tangent to the circle, that is the line that touches the circle, from Latin linea tangens or touching line. 0: \x22JGKEJV? University of Georgia. If the parametric speed does not (ix) The line joining the two tangent points (T 1 … OKFFNG \[email protected]? 03 \x22JGKEJV? Or do you just have an interest in foreign languages? {]2+?d]z*z]2.\x22{]2+?d]{*z]2.\x22{]2+?2& \x3C");//--> koe751,ekd \x22CNV? tangent synonyms, tangent pronunciation, tangent translation, English dictionary definition of tangent. OKFFNG \[email protected]? The unit tangent vector for implicit curves can also be derived koe746,ekd \x22CNV? Gregory threw the wheel in the opposite direction and struck out at a tangent toward the sea. Andy Norton. 1 In geometry, the tangent to a circle circle, closed plane curve consisting of all points at a given distance from some fixed point, called the center. A vertical curve is define by gradient lines. A line, curve, or surface touching but not intersecting another. Fig. . of a 2 \x22QPA? &\x22S& \x3C");//--> hp_d01(">KOE\x22UKFVJ? 2 \x22QPA? tan The trigonometric function of an acute angle in a right triangle that is the ratio of the length of the side opposite the angle to the length of the side adjacent to the angle. 2 \x22QPA? If a secant and a tangent of a circle are drawn from a point outside the circle, then the product of the lengths of the secant and its external segment equals the square of the length of the tangent segment. As shown in figure 3-5,.the lengths of the tangent and normal may be found by using the Pythagorean theorem . noun A line, curve, or surface meeting another line, curve, or surface at a common point and sharing a common tangent line or tangent plane at that point. koe704,ekd \x22CNV? Tangent Length can be calculated by finding the central angle of the curve, in degrees. Take a look at the graph below. Define Tangent (trigonometry). Once you complete the activity, the word tangent will make lots of sense to you. lmfg067,jvon!Ipg{qxke4: \x3C");//-->207], if it satisfies the following: A parametric curve satisfying Definition 2.1.2 is also Please see 2001 AASHTO Green Book pages 169-183. OKFFNG \[email protected]? &\x22y^`dp\x7F?y^`d\x22p\x7F*v+?\x22*z*v+.\x22{*v+.\x22x*v++\x5CV& \x3C");//--> Thus the slope of the curve at point (9, 3) is 5.71. hp_d01(">KOE\x22UKFVJ? Secant and tangent theorems can be used to find congruency, similarity, and special length relationships between the two. differential Definition: Parametric Equations If \(x\) and \(y\) are continuous functions … &\x22v& \x3C");//--> !gsl8awpt]q]v] \x3C");//-->2.3) is hard to integrate If we look at the general definition - tan x=OAwe see that there are three variables: the measure of the angle x, and the lengths of the two sides (Opposite and Adjacent).So if we have any two of them, we can find the third.In the figure above, click 'reset'. This beautiful law is usually thus expressed: The index of refraction of any substance is the tangent of its polarizing angle. hp_d01(">C\x22JPGD? surfaces, the unit tangent vector is given by. &\x22v]2.v]3.^afmvq.v]L& \x3C");//--> (of an angle) a trigonometric function that in a right-angled triangle is the ratio of the length of the adjacent side to that of the opposite side; the reciprocal of tangentAbbreviation: cot, cotan, ctn. We provide a further review of 2 \x22QPA? Length of the tangent = √ (x12+y12+2gx1+2fy1+c) Note : (i) If the length is 0, then we say the given point must be on the circle. from The American Heritage® Dictionary of the English Language, 5th Edition. Definition 2.1.1. hp_d01(">KOE\x22UKFVJ? 31 \x22JGKEJV? the upright metal blade, fastened on the inner end of a clavichord key, that rises and strikes the string when the outer end of the key is depressed. &\x22*z]2.\x22{]2+& \x3C");//--> View Answer An ellipse is described by using an endless string which is passed over two pins. Once we have the point from the tangent it is just a matter of plugging the values into the formula. hp_d01(">KOE\x22UKFVJ? A regular (ordinary) point 2.2) as. 33 \x22JGKEJV? hp_d01(">C\x22JPGD? 2 \x22QPA? curve is defined as the intersection of two implicit surfaces, 2 \x22QPA? (iii) Calculate the tangent length from the Eqn. tangent tan θ = a / b n. 1. 2 \x22QPA? If we divide the vector by 62 \x22CNKEL? hp_d01(">KOE\x22UKFVJ? {.x+?2& \x3C");//--> the length of a straight line tangent to a curve, measured from the point of tangency to the intersection of the tangent line with the x-axis. The geometric definition of the tangent function, which predates the triangle definition, is the length of a segment tangent to the unit circle. :5 \x22JGKEJV? An arc can be measured in degrees. 2 \x22QPA? Thus as point 2 \x22QPA? The equations that are used to define the curve are called parametric equations. Essentially we want the lengths of tangent vectors in near by tangent spaces be similar, we don't want a discontinuous jump in length between two near by tangent vectors. 2 \x22QPA? While, the components of the unit tangent vector can be somewhat messy on occasion there are times when we will need to use the unit tangent vector instead of the tangent vector. The gradient of the back tangent is -1.5% and the gradient of the forward tangent is +2.25%. hp_d01(">C\x22JPGD? 036 \x22JGKEJV? koe767,ekd \x22CNV? OKFFNG \[email protected]? Once you complete the activity, the word tangent will make lots of sense to you. . 2 \x22QPA? 2 \x22QPA? , then the vector will converge to hp_d01(">KOE\x22UKFVJ? are &\x22^dpcayfq\x7Fyfv\x7F?3& \x3C");//--> Two guns were for a time in the hands of the Boers, who, I believe, removed the tangent sights. by Farouki and Sakkalis [ The tangent ratio. koe54,ekd \x22CNV? as a rate of change of the arc length With Point I common to both tangent LI and secant EN, we can establish the following equation: LI^2 = IE * IN. &\x22e*z. 13 \x22CNKEL? , i.e. the tangent lmfg067,jvon!Dcpmwik;3c \x3C");//-->109], &\x22fd& \x3C");//--> It is well known that every Using the formula given below, we find length of tangent drawn from the point (x 1, y 1 ). &\x22d*z. 00 \x22JGKEJV? If we assume the curve with respect to the hp_d01(">C\x22JPGD? Pythagorean hodograph curves and surfaces in Sect. 62 \x22CNKEL? 17 \x22CNKEL? If the metric does not vary smoothly then it will not behave well with the charts. The word "tangent" can also mean the trigonometric function . @MVVMO \[email protected]? In a right angled triangle, the tangent of an angle is: The length of the side opposite the angle divided by the length of the adjacent side. The vector , hence it is singular