SOLUTION: Use one of the product-to-sum formulas to write the given product as a sum of sines or a sum of cosines. cos 6θ cos 2θ

Question 1028367: Use one of the product-to-sum formulas to write the given
product as a sum of sines or a sum of cosines.
cos 6θ cos 2θ
Answer by Edwin McCravy(20060) (Show Source): You can put this solution on YOUR website!

Add the two equations:




Get


Multiply both sides by 1/2



Swap sides:

 <--product-to-sum formula

Let , 





Edwin

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SOLUTION: Use one of the product-to-sum formulas to write the given product as a sum of sines or a sum of cosines. cos 6&#952; cos 2&#952;