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Solve cot theta = sin 2 theta by subst...

Solve ` cot theta = sin 2 theta ` by substituting ` sin 2 theta =( 2 tan theta )/( 1+tan^(2) theta )` and again by substituting ` sin 2 theta = 2 sin theta * cos theta ` and check whether the two answer are same or not .

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