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

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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)   (Show Source): You can put this solution on YOUR website!
.

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


    .


You do the rest.


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

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



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