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If tanbeta=2sinalphasingammacos e c(alph...

If `tanbeta=2sinalphasingammacos e c(alpha+gamma),` then `cotalpha,cotbeta,cotgamma` are in (a)A.P. (b) G.P. (c) H.P. (d) none of these

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CENGAGE ENGLISH-TRIGONOMETRIC FUNCTIONS-All Questions
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