Friday

November 28, 2014

November 28, 2014

Posted by **ethan** on Thursday, May 17, 2007 at 12:05am.

(2sin2x)(cos6x)

sin 2x and cos 6x can be expressed as a series of terms that involve sin x or cos x only, but the end result is not a simplification.

sin 2x = 2 sinx cosx

cos 6x = 32 cos^6 x -48 cos^4 x

+ 18 cos^2 x - 1

I assume you are not talking abous sin^2 x and cos^6 x

cos 6x could be written 2 cos^2 3x -1

but that doesn't help much, either

**Answer this Question**

**Related Questions**

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

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

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

Precal - I do not understand how to do this problem ((sin^3 A + cos^3 A)/(sin A...

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

Calculus 12th grade (double check my work please) - 1.)Find dy/dx when y= Ln (...

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

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

Math(Please check) - Use the fundamental identities to simplify the expression. ...

Trig - Given: cos u = 3/5; 0 < u < pi/2 cos v = 5/13; 3pi/2 < v < ...