# Calculus Examples

Let , where . Then . Note that since , is positive.

Rewrite as .

Since both terms are perfect squares, factor using the difference of squares formula, where and .

Multiply by .

Expand using the FOIL Method.

Simplify and combine like terms.

Factor out of .

Factor out of .

Factor out of .

Apply pythagorean identity.

Rewrite as .

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

Multiply by .

Raise to the power of .

Raise to the power of .

Use the power rule to combine exponents.

Add and .

Since is constant with respect to , move out of the integral.

Use the half-angle formula to rewrite as .

Since is constant with respect to , move out of the integral.

Write as a fraction with denominator .

Multiply and .

Split the single integral into multiple integrals.

Since is constant with respect to , move out of the integral.

Let . Then , so . Rewrite using and .

Write as a fraction with denominator .

Multiply and .

Since is constant with respect to , move out of the integral.

The integral of with respect to is .

Simplify.

Replace all occurrences of with .

Replace all occurrences of with .

Replace all occurrences of with .

Simplify each term.

Apply the distributive property.

Simplify .

Write as a fraction with denominator .

Multiply and .

Simplify .

Multiply and .

Multiply by .

Reorder terms.