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15 December, 15:32

Verify the basic identity. What is the domain of validity? cot theta = cos theta csc theta

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  1. 15 December, 17:09
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    Cot x = cos x csc x

    1/tan x = cosx (1/sin x)

    1 / (sin x / cos x) = cos x / sin x

    cos x / sin x = cos x / sin x

    The domain of validity is all real number values of x except for sin x = 0.
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