Apply pythagorean identity.

Pull terms out from under the radical, assuming positive real numbers.

Factor out of .

Separate fractions.

Rewrite as a product.

Write as a fraction with denominator .

Divide by .

Convert from to .

Divide by .

Raise to the power of .

Raise to the power of .

Use the power rule to combine exponents.

Add and .

Reduce (cos(pi/2-x)^2)/( square root of 1-sin(x)^2)