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prove that tan 1 tan2 tan3.......tan89=1 |
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Answer» Tan 89,=tan(90-1)=cot1 tan88=cot2 ... Tan1 .cot1=1... Tan1.tan2.tan3.....tan89=1 We know tht tan 89 can be written cot 1 (tan 89= cot 90-89) so like that only tan 1 and cot 1 will be cancelled ) like this we will get 1 Answer 1. |
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