SOLUTION: Rewrite as a product Cos9x-Cox7x I am having trouble with this question however, i got -2Sin8XSinX Is this correct?

Algebra.Com
Question 950264: Rewrite as a product Cos9x-Cox7x
I am having trouble with this question however, i got -2Sin8XSinX
Is this correct?

Answer by jhaashok630(18)   (Show Source): You can put this solution on YOUR website!
yes right
Formula : Cos A - Cos B = -2 sin (A+B)/2 sin(A-B)/2

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