# exact value of trigonometric function

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.

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