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If (tan3alpha)/(tanalpha)=lambda,show th...

If `(tan3alpha)/(tanalpha)=lambda`,show that `(sin3alpha)/(sinalpha)=(2lambda)/(lambda-1)`and hence prove that the value of `lambda`does not lie between 1/3 and 3

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UNITED BOOK HOUSE-ANNUAL EXAMINATION QUESTION PAPERS 2015-EXERCISE
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