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Prove that: a) cotthetacot(60^(@)-thet...

Prove that:
a) `cotthetacot(60^(@)-theta)cot(60^(@)+theta)=cot3theta`
b) `cos5theta=16cos^(5)theta-2thetacos^(3)theta+5costheta`
c) `sin4theta=4sinthetacos^(3)theta-4costhetasin^(3)theta`

Answer

Step by step text solution for Prove that: a) cotthetacot(60^(@)-theta)cot(60^(@)+theta)=cot3theta b) cos5theta=16cos^(5)theta-2thetacos^(3)theta+5costheta c) sin4theta=4sinthetacos^(3)theta-4costhetasin^(3)theta by MATHS experts to help you in doubts & scoring excellent marks in Class 11 exams.

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