Asked by vikrant sharma

prove that
cotxcot2x-cot2xcot3x-cot3xcotx=1

Answers

Answered by Reiny
I picked a random angle (20ยบ) and tested your "identity".
the left side was equal to 1

when you typed
cotxcot2x ...
did you mean
cotxcot(2x)... or cotxcot<sup>2</sup>x ... ?
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