The function is .

Apply derivative on each side with respect to .

Inverse trigonometric functions of derivatives: .

To find the relative extrema, take .

Square on both sides.

Substitute  in the function .

The point is .

Substitute  in the function .

The point is .

Derivative on each side with respect to .

Identify the nature of the extrema points.

Point	Sign of	Conclusion
	\ \	Relative minimum
	\ \	Relative maximum

The relative minimum point is .

The relative maximum point is .

The relative minimum point is .

The relative maximum point is .