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

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


   

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) About Me  (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