Trigonometric Integrals
Even Powers of sin x or cos x:
Apply the sine and cosine half-angle:
Odd Powers of sin x or cos x:
Relate sine and cosine using the formula:
With an Even and Odd Exponent:
The odd exponent becomes one even and one odd.
The change of variable can also be made t = sin x or t = cos x
Products of Type sin(nx) · cos(mx):
Products are transformed into sums:
cos (-4x) = cos 4x
