SOLUTION: cos^4 theta - sin^4 theta = cos^2 theta - sin^2 theta

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Question 947382: cos^4 theta - sin^4 theta = cos^2 theta - sin^2 theta
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
cos^4 theta - sin^4 theta = cos^2 theta - sin^2 theta
simplify:
cos%5E4%28x%29-sin%5E4%28x%29=cos%5E2%28x%29-sin%5E2%28x%29

cos%5E2%28x%29%2Bsin%5E2%28x%29=1