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OpenStudy (anonymous):
Simplify the trigonometric expression.
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OpenStudy (anonymous):
@ganeshie8
OpenStudy (anonymous):
@hartnn
OpenStudy (anonymous):
@cwrw238
hartnn (hartnn):
i can't see the problem
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OpenStudy (anonymous):
OpenStudy (cwrw238):
Hint use the identity sin^2 theta = 1 - cos^2 theta
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