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September 20, 2014

September 20, 2014

Posted by **Cynthia** on Saturday, August 4, 2012 at 9:16pm.

A. Cos^3(4x)/3 + C

B. -Cos^3(4x)/3 + C

C. Cos^3(4x)/12 + C

D. -Cos^3(4x)/12 + C

- Calculus -
**MathMate**, Saturday, August 4, 2012 at 11:41pmUse the substitution

p=cos(4x)

dp=-4sin(4x)dx

I=∫sin(4x)cos²(4x)dx

=∫(1/4)p²dp

Can you take it from here?

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