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OpenStudy (anonymous):
Is it identity or not? If so how? sin x /1-cos x +sin x/1+cos x=2csc x
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OpenStudy (anonymous):
well, add the fractions, and multiply thru by sin .... is my thought
OpenStudy (anonymous):
is: sin(1-cosx) + sin(1+cosx) = 2, for all x?
OpenStudy (anonymous):
factor the sin .. sin (1-cos + 1 + cos) = 2 2 sin = 2 ... if i see it right ... does that always work for any x?
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