The integral is .

Evaluate the integral by using substitution method.

Let , then .

Boundaries of the integral :

If , then .

If , then .

Substitute corresponding values in .

Consider .

Evaluate the integral by using substitution method.

Let , then .

Boundaries of the integral :

If , then .

If , then .

Substitute corresponding values in .

Integrals of symmetric functions :

If the function  is continuous on .

1. If  is even , then .

2. If  is odd , then .

Consider .

Since  is odd , .

Consider .

Apply formula : .

Thus, .

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