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1-cos^2x
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Evaluate the following limit:displaystyle lim_{xrightarrow 0}{dfrac{(1-cos 2x)}{sin^2 2x}}
int dfrac {1}{ (1- cos 2x)} dx
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Ex 12.1, 17 - Evaluate: lim x->0 cos2x - 1 / cosx - 1 - Ex 12.1
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Is there any formula for 1-cos2x? - Quora
