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Use the power-reducing formulas as many times as possible to rewrite the expression in terms of the first power of the cosine. 2 sin4 2x
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Use the power-reducing formulas as many times as possible to rewrite the expression in terms of the first power of the cosine. 2 sin4 2x

User Sergey Volkov
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4 votes
I guess you need to do 42x2=84
User Tony Morris
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