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trig

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Find cosq and sinq if the terminal side of q lies along the line y = - 2 x in
quadrant IV.

  • trig - ,

    take x = 1
    then y = -2
    hypotenuse = sqrt (1+4) = sqrt 5
    then
    sin q = -2/sqrt 5
    cos q = 1/sqrt 5

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