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trig

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Find the exact value of the trigonometric function given that
sin u = − 8/17 and cos v = − 3/5.
(Both u and v are in Quadrant III.)

cot(v − u)

  • trig -

    cot(v-u) = (cotv cotu + 1)/(cotu - cotv)

    = [(3/4)(15/8) + 1] / [(15/8) - (3/4)]
    = (77/32) / (3/8)
    = 77/12

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