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21 September, 01:15

If 3sinA=2, find the value of (cotA-1)

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  1. 21 September, 04:29
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    √5 / 2 - 1 or 0.1180 to the nearest 10,000th.

    Step-by-step explanation:

    3 sin A = 2

    sin A = 2/3

    The adjacent (to < A) leg of the right triangle = √ (3^2 - 2^2) = √5.

    So cot A = adjacent / opposite = √5 / 2

    and cot A - 1 = √5/2 - 1.
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