SOLUTION: use the product to sum formula to rewrite the product as a sum or difference. sin 4theta sin 2theta

Algebra ->  Trigonometry-basics -> SOLUTION: use the product to sum formula to rewrite the product as a sum or difference. sin 4theta sin 2theta      Log On


   

Question 1179434: use the product to sum formula to rewrite the product as a sum or difference.
sin 4theta sin 2theta
Answer by ikleyn(52800) About Me  (Show Source):
You can put this solution on YOUR website!
.

The product to sum formula, relevant to this case, is


    sin%28a%29%2Asin%28b%29+=+%281%2F2%29%2A%28cos%28a-b%29+-+cos%28a%2Bb%29%29.


You do the rest.


In the formula, use  a= 4theta,  b= 2theta.

You are instructed - - - hence, you know the way.