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    exact value of trigonometric function

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    Use the given information to find the exact value of
    a) sin alpha/2 =
    b) cos alpha/2 =
    c) tan alpha/2 =

    when sec alpha = -17/8, alpha lies in quadrant 2

    (Type an exact answer, using radicals as needed. simplify answer)

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    Solution Summary

    By applying the half angle formulas, this solution shows how to find the exact values of the trigonometric functions.