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Prove sinA-2sincubeA÷2coscubeA-cosA=tan A

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Prove sinA-2sincubeA÷2coscubeA-cosA=tan A

Posted by Lijo Jose 6 years, 10 months ago

CBSE > Class 10 > Mathematics

2 answers

Nitin Dadhich 6 years, 10 months ago

Take LHS... SinA-2sin^3A/2cos^3A-cosA... SinA(1-2sin^2A)/cosA(2cos^2A-1) 【Sin^2A= 1- Cos^2A】.. SinA(1-2+2cos^2A)/cosA(2cos^2A-1).... SinA(cos^2A-1)/cos(2cos^2A-1)... Then cos^2A- 1will be canceled out.... SinA/cosA= tanA LHS=RHS

1Thank You

Anshul ×_*_× Sahu 6 years, 10 months ago

Hence prove

2Thank You

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