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Mathematics, 18.02.2020 22:56 nathangirnet

1−(cos^4(α))−(1/4)(sin^2(2α))+ cos(2α)

im really confused on how to do it, so please help.

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1−(cos^4(α))−(1/4)(sin^2(2α))+ cos(2α)

im really confused on how to do it, so please hel...
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