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OpenStudy (ohohaye):
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OpenStudy (ohohaye):
OpenStudy (anonymous):
the second question answer should be cos(2x)
OpenStudy (anonymous):
sinx(cosx.cotx-sinx) =sinx(cosx.cosx/sinx)-sinx^2 =cosx^2-sinx^2 =cos(2x)
OpenStudy (ohohaye):
Ok
OpenStudy (ohohaye):
But the first is right?
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OpenStudy (anonymous):
Yes its correct
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