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OpenStudy (anonymous):
Use trigonometric identities to simplify the trigonometric expression (1-cosx)(1+cosx)
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OpenStudy (anonymous):
foil to get 1-cos^2(x) which simplifies to sin^2(x)
OpenStudy (anonymous):
is that what you were looking for?
OpenStudy (anonymous):
yes thank you so so so much!!!
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