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Cos^2x-cos^6x=sin4xsin8x

Cos^2x-cos^6x=sin4xsin8x
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Cos^2x-cos^6x=sin4xsin8x

User Igor Artamonov
by
8.2k points

1 Answer

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(cos2x+cos6x)(cos2x-cos6x) =

(2 sin 4x cos 4x) (2 sin 2x cos 2x) =

sin 8x sin 4x (Answer)
User Ramrunner
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8.6k points
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