find dy/dx if x= 2cos theta - cos 2theta
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dy/dx= 2 d/dx(cos theta) -d/dx(cos 2theta)
= -2 sin theta+2 sin 2 theta = 2(sin 2 theta-sin theta)
= -2 sin theta+2 sin 2 theta = 2(sin 2 theta-sin theta)
harigrasssvp08mn4:
sry
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