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Rewrite the expression as an equivalent expression that does not contain powers of trigonometric functions greater than 1. cos^4(x)
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Rewrite the expression as an equivalent expression that does not contain powers of trigonometric functions greater than 1.

cos^4(x)

User Trench
by
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1 Answer

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cos^4(x) =
(cos²x)² =
(1-sen²x)² =
1² - 2*1*sen²x + sen^4x =
1 - 2sen²x + sen^4x
User Derk
by
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