$\"\"$

The trigonometric function is $\"\"$ and the range is $\"\"$ .

Find the inverse of $\"\"$ by interchanging $\"\"$ and $\"\"$ .

Thus, the inverse function is $\"\"$ .

This is the equation of the inverse cosine relation.

$\"\"$

Draw a coordinate plane.

Graph the two functions $\"\"$ and $\"\"$ in the same coordinate plane on the interval $\"\"$ .

Graph :

$\"graph$

Observe the graph of the functions :

The graph of $\"\"$ is reflect the line $\"\"$ to obtain t he graph of $\"\"$ .

$\"\"$

Graph :

$\"graph$