The integral is .

Determine the function is even or odd.

Substitute .

.

The integrand  is a even function.

If  is an even function, then .

(a) Find .

The integrand  is a even function.

If  is an even function, then .

.

.

.

(b) Find .

The integrand  is a even function.

If  is an even function, then .

.

.

(c) Find .

.

.

(d) Find .

.

(a) .

(b) .

(c) .

(d) .