Posted by hayden on Sunday, February 22, 2009 at 8:18pm.
cos^2 (a+x) sin^2 a=cos x * cos(2a+x)

precalc and trig  Reiny, Sunday, February 22, 2009 at 8:22pm
see
http://www.jiskha.com/display.cgi?id=1235346549
don't tell my I did all that work, and you didn't even look at it.

precalc and trig  hayden, Sunday, February 22, 2009 at 8:43pm
i posted a sorry. i posted this twice on that one. And i don't understand how RS=LS and thanks
Answer This Question
Related Questions
 TRIG!  Posted by hayden on Monday, February 23, 2009 at 4:05pm. sin^6 x + cos^6...
 trig  Reduce the following to the sine or cosine of one angle: (i) sin145*cos75...
 Mathematics  Trigonometric Identities  Let y represent theta Prove: 1 + 1/tan^...
 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...
 Trig  Given: cos u = 3/5; 0 < u < pi/2 cos v = 5/13; 3pi/2 < v < ...
 Trig  Find sin(s+t) and (st) if cos(s)= 1/5 and sin(t) = 3/5 and s and t are ...
 algebra  Can someone please help me do this problem? That would be great! ...
 calculus  Differentiate. y= (cos x)^x u= cos x du= sin x dx ln y = ln(cos x)^x...
 Calc.  Differentiate. y= (cos x)^x u= cos x du= sin x dx ln y = ln(cos x)^x ln...
More Related Questions