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O TRIGONOMETRIC IDENTITIES AND EQUAT. Power-reducing identities Use the power reducing formulas to rewrite cos*x in terms of
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We know Cos (2x) = 2 cos²x-1 Cos²x = 2 (1+Crs (22) > Cos? (2x) - † 11+ Cos(4x)) So ..² cost x = (Cos²x)² [ 1 (1 + cos 2x - to

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need help with this problem ! thanks ! O TRIGONOMETRIC IDENTITIES AND EQUAT. Power-reducing identities Use...
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