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5 November, 07:05

Find the exact value of cot-1 (1).

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  1. 5 November, 09:16
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    suppose

    y=cot^-1 (1)

    cot (y) = 1

    1/tan (y) = 1

    tan (y) = 1

    y = π/4 radians

    =cot^-1 (1) = π/4

    y = 5π/4 radians

    cot^-1 (1) = 5π/4
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