Apr 13, 2018 · tan 90 = oo tan 90 = sin 90 / cos 90 = 1 / 0 = oo. Trigonometry . Science

Nov 27, 2015 · tan90^@ is undefined. Since the angle is 90^@, there will be a unit circle instead of a special triangle. Any point at 90^@ can be described as (0, y). However, to make things …

Mar 7, 2018 · How do you tell whether the value of tan 90 degrees is positive, negative, zero or undefined? Trigonometry Right Triangles Relating Trigonometric Functions 1 Answer

Jul 17, 2016 · How do you prove tan(90°+a)=-cot(a)? Trigonometry Trigonometric Identities and Equations Fundamental ...

Oct 15, 2015 · This is a good question indeed! I'll try to give you a visual explanation. Consider the trigonometric meaning of tangent of an angle alpha: The tangent of alpha is equal to the …

Sep 21, 2015 · Using a unit circle (so the hypotenuse #=1#) and its intersection with an angular arm in standard position:. the six basic trigonometric functions are defined as

Oct 20, 2015 · #tan(90^@)# is undefined. Explanation: By definition, using a reference triangle with hypotenuse of unit ...

Jul 11, 2015 · How do you use the reference angles to find #sin210cos330-tan 135#? How do you know if #sin 30 = sin 150#? How do you show that #(costheta)(sectheta) = 1# if #theta=pi/4#?

May 8, 2018 · LHS=tan(90^@− A) sec(180^@+ A) cos(90^@+ A) =cotA(- secA)(- sin A) =cosA/sinA*1/cosA*sin A =1

Nov 5, 2015 · The answer is -pi/4 Alright, archtan / tan^-1(x) is the inverse of tangent. Tan is sin/cos. Like the inverse of sin, the inverse of tan is also restricted to quadrants 1 and 4. …