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If theta_(1), theta_(2), theta_(3), theta_(4),….., theta_(n) are in AP whose common difference is d, show that sec theta_(1) sec theta_(2) + sec theta_(2) sec theta_(3)+ ………+ sec theta_((n-1)) sec theta_(n)= (tan theta_(n)- tan theta_(1))/(sin d)

Answer»


ANSWER :`TAN theta_(N)- tan theta_(1)`


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