1. Evaluate: tan 1° tan 2° tan 3° …………….tan 89°





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  • By: anil on 05 May 2019 01.57 am
    tan 1° tan 2° tan 3° …………….tan 88° tan 89° = tan 1° tan 2° tan 3 ° ...........tan 43° tan 44° tan 45° cot 44° cot 43°..........cot 2° cot 1° As we know tan 1° X cot 1° = tan 2° X cot 2° = ........................= tan 44° X cot 44° = 1 and tan 45° = 1 hence , tan 1° tan 2° tan 3° …………….tan 88°tan 89° = 1

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