SOLUTION: Simplify the expression by using a double-angle formula. cos^2(2 theta)- sin^2(2 theta)

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Question 1034292: Simplify the expression by using a double-angle formula.
cos^2(2 theta)- sin^2(2 theta)
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
By a direct application of the double-angle identity, cos%5E2%282%2A+theta%29-+sin%5E2%282%2A+theta%29+=+cos%284%2Atheta%29.