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22 October, 20:07

Given csc x/cot x = Square root of 2, find a numerical value of one trigonometric function of x.

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  1. 22 October, 22:10
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    cscx/cotx = 1/sin (x) / (cos (x) / sin (x)) = 1*sin (x) / (sin (x) * cos (x)) = 1/cos (x) = sqrt (2)

    Now solve for x

    1/cos (x) = sqrt (2)

    cos (x) = 1/sqrt (2) = sqrt (2) / 2

    => x=2k π ± π / 4 (general solution)

    Thus for x in the first quadrant, x=45 degrees, and

    sin (x) = sqrt (2) / 2 = 0.70710678

    cos (x) = sqrt (2) / 2 = 0.70710678

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