Question #7b915

1 Answer
Jun 21, 2017

F^(-1)=cos(x/2)

Explanation:

The inverse function f^(-1)(x) is a reflection of the function f(x) along the curve y=x. In other words, switching x and y around.

F(x)=2arccosx
Let y=F(x)

y=2arccosx
x=cos(y/2)
F^(-1)=cos(x/2)