SOLUTION: Simplify: {{{cos^2(x/2)-sin^2(x/2)}}}

Algebra ->  Trigonometry-basics -> SOLUTION: Simplify: {{{cos^2(x/2)-sin^2(x/2)}}}      Log On


   

Question 549620: Simplify:
cos%5E2%28x%2F2%29-sin%5E2%28x%2F2%29
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Simplify:
cos%5E2%28x%2F2%29-sin%5E2%28x%2F2%29
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= cos(x) it's an identity