How do you find the value of tan 90? - Socratic
2018年4月13日 · tan 90 = oo tan 90 = sin 90 / cos 90 = 1 / 0 = oo. Trigonometry . Science
How do you prove tan(90°+a)=-cot(a)? - Socratic
2016年7月17日 · How do you prove tan(90°+a)=-cot(a)? Trigonometry Trigonometric Identities and Equations Fundamental ...
How do you evaluate #tan 90 - Socratic
2015年11月27日 · 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 easier to understand, we will use a radius of 1, meaning the height (y) is also 1. The point will be (0, 1). tan90^@=y/x tan90^@=1/0 tan90^@=undefined tan90^@ is undefined because …
How do you tell whether the value of tan 90 degrees is positive ...
2018年3月7日 · 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
Why are the tangents for 90 and 270 degrees undefined?
2015年10月15日 · 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 length of the segment AB; but when alpha becomes 90^@ the length of AB get stretched upwards (or downwards for alpha=270^@) so that we will never meet A!!! Hope it helps!
How to show? tan (90 − A) sec (180 + A) cos (90 + A) = 1 - Socratic
2018年5月8日 · LHS=tan(90^@− A) sec(180^@+ A) cos(90^@+ A) =cotA(- secA)(- sin A) =cosA/sinA*1/cosA*sin A =1
Proving Identities - Trigonometry - Socratic
The best videos and questions to learn about Proving Identities. Get smarter on Socratic.
Is tan(x + 90) = -cot(x)? | Math Help Forum
2013年11月12日 · Is tan(x + 90) = -cot(x) ? \tan(90^\circ) is not defined. That is why you were told to use the sum of angles formulas for sine and cosine, not the sum of angles formula for tangent.
Double Angle Identities - Trigonometry - Socratic
Following table gives the double angle identities which can be used while solving the equations.. You can also have #sin 2theta, cos 2theta# expressed in terms of #tan theta # as under.
How do you find Tan^-1(-1) without a calculator? - Socratic
2015年11月5日 · 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. Knowing this we are solving for the inverse of tan -1. We are basically being asked the question what angle/radian does tan(-1) equal. Using the unit circle we can see that tan(1)= pi/4. Since the …