Saturday

April 18, 2015

April 18, 2015

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?

**Answer this Question**

**Related Questions**

calculus - Differentiate. y= (cos x)^x u= cos x du= -sin x dx ln y = ln(cos x)^x...

TRIG! - Posted by hayden on Monday, February 23, 2009 at 4:05pm. sin^6 x + cos^6...

Math - Calculus - The identity below is significant because it relates 3 ...

Mathematics - Trigonometric Identities - Let y represent theta Prove: 1 + 1/tan^...

Calc. - Differentiate. y= (cos x)^x u= cos x du= -sin x dx ln y = ln(cos x)^x ln...

Integral - That's the same as the integral of sin^2 x dx. Use integration by ...

tigonometry - expres the following as sums and differences of sines or cosines ...

pre-cal - Simplify the given expression........? (2sin2x)(cos6x) sin 2x and cos ...

trig - Reduce the following to the sine or cosine of one angle: (i) sin145*cos75...

algebra - Can someone please help me do this problem? That would be great! ...