prove that : (sinA-2sin^3A/ 2 cos^3-cosA)=tanA – InterviewSolution

1.

prove that : (sinA-2sin^3A/ 2 cos^3-cosA)=tanA

Answer»

LHSsin A ( 1 - sin ² A ) / [ cos A ( 2 cos ² A - 1 ) ]

sin A ( 2 cos ² A - 1 )/cos A ( 2 cos ² A - 1 )sin A/cos AtanA

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