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Asked by jenna

find the single term of cos^2 4theta - sin^2 4theta
13 years ago

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Answered by Count Iblis
Cos^2(x) - Sin^2(x) = Cos(2 x)

So, you can write the expression as

cos(8 theta)
13 years ago
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find the single term of cos^2 4theta - sin^2 4theta

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