Question

I have an AP calculus question and tell 12th grade math about Derivatives a picture is included

Answer 1

Given:

$f(x)=\cos^{-1}x$

At x

$=\frac{\pi}{2}$

Required:

To find the equation of the tangent line.

Explanation:

First we have to find the y-coordinate where

$x=\frac{\pi}{2}$

Now