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Introduction to Trigonometry  (
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Mathematics Class X > Introduction to Trigonometry
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Q. Q. find tan 1 tan 2 tan 3................tan 88 tan 89. ...
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1 answer under Introduction to... 1 year, 8 months ago

A. _tan 89= 1/tan1 tan88=1/tan2 tan87=1/tan3 in this way if u write all then the first term and the last term will get cancelled. only tan 45 will remain the value of tan 45 is 1 therefore... link
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