plzz ....prove that :tan3A-tan4A-tanA = tan3A tan2A tanA

Discussion Response Post to: plzz ....prove that :tan3A-tan4A-tanA = tan3A tan2A tanA

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21 May 2010 10:01:30 IST

Subject: plzz ....prove that :tan3A-tan4A-tanA = tan3A tan2A tanA

Blazing IASian

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tan(3A) = tan(2A + A) =( tan(2A) + tan(A) ) / ( 1 - tan(2A) tan(A) )

tan(3A) - tan(A) tan(2A) tan(3A) = tan(2A) + tan(A)

tan(3A) - tan(2A) - tan(A) = tan(A) tan(2A) tan(3A)

I think there's some problem in the question. Its not 4A but 2A.

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this reply: 12 points (with 2 Olaaa!! Perrrfect answer.

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