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mtan(a-30)=ntan(a+120), prove that 2cos2a= (m+n)/(m-n)

mtan(a-30)=ntan(a+120), prove that 2cos2a= (m+n)/(m-n)

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1 Answers

Deepak Kumar Shringi
askIITians Faculty 4404 Points
6 years ago
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