Posted by jeff on Friday, May 28, 2010 at 9:15am.
Help How do I figure out:
(cos 40)(cos20)  (sin 40)(Sin 20)
Thank you

Algebra2  jeff, Friday, May 28, 2010 at 9:22am
I got it, .5
Answer This Question
Related Questions
 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 ...
 Mathematics  Trigonometric Identities  Let y represent theta Prove: 1 + 1/tan^...
 algebra  Can someone please help me do this problem? That would be great! ...
 trig  it says to verify the following identity, working only on one side: cotx+...
 trig  Reduce the following to the sine or cosine of one angle: (i) sin145*cos75...
 pre calc trig check my work please  sin x + cos x  = ? sin x sin ...
 math  Prove that for all real values of a, b, t (theta): (a * cos t + b * sin t...
 Trig  If angle A is 45 degrees and angle B is 60 degrees. Find sin(A)cos(B), ...
 Precal  I do not understand how to do this problem ((sin^3 A + cos^3 A)/(sin A...
More Related Questions