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OpenStudy (anonymous):
Use basic identities to simplify the expression. cos θ - cos θ sin2θ A. sec2θ B. sin θ C. tan2θ D. cos3θ
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OpenStudy (zehanz):
One such basic identity is sin2θ = 2sinθcosθ...
OpenStudy (zehanz):
I don't think any of the answers fits. Are you sure the expression is right?
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