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24 August, 13:38

How to find cot of 60 given sin and tan of 30?

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  1. 24 August, 13:47
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    Use tan 2x = 2tan x / (1 - tan^2x)

    so tan 60 = 2 tan 30 / 1 - tan^2 30 = 1.7321

    cot 60 = 1 / 1.7321 = 0.5774 Answer
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