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OpenStudy (anonymous):
(sin x)(tan x cos x - cot x cos x) = 1 - 2 cos2x
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OpenStudy (loser66):
solve or prove?
OpenStudy (anonymous):
I would assume solve
OpenStudy (anonymous):
no we need to prove it
OpenStudy (anonymous):
i've actually did that i need help with another one,
OpenStudy (anonymous):
1 + sec^2x sin^2x = sec^2x
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OpenStudy (loser66):
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