Step 1:

The function is .

Rewrite the function, .

Derivative on each side with respect to .

Apply the derivatives of inverse trigonometric function: .

Step 2:

To find the relative extrema,solve .

Squaring on each side.

Let .

The above equation is in the form of a quadratic equation

The roots of the quadratic equation is .

Step 3:

Compare with .

Substitute in above value.

.

The negative toot is not considered since can not be negative.

Step 4:

.

Substitute in .

The point is .

Substitute in .

The point is .

Solution :

The relative maximum point is .

The relative minimum point is .