# Math Help - trig substitutions

1. ## trig substitutions

How would you do this
integral of sin^4(2x)dx by using trig substitution? The 4th power throws me off.

2. Originally Posted by davecs77
How would you do this
integral of sin^4(2x)dx by using trig substitution? The 4th power throws me off.
Use the half-angle identity.