How do you tackle these? 1. 2cos^2 4x-1 sin4xcos4x 2. 1-4sin^2x+4sin^4x The answers to the first is 2cot8x and the second is cos^22x. I would like to see the step by step process. Help would be appreciated thanks!
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Is it: 1. and 2. ?
We use the addition formulas for sine and cosine here. Recall: Originally Posted by andrewsx How do you tackle these? 1. 2cos^2 4x-1 sin4xcos4x 2. 1-4sin^2x+4sin^4x ............Note that this is quadratic in , so let's foil
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