For the following exercises, find the exact values of a) sin (x/2), b) cos (x/2), and c)
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For the following exercises, find the exact values of a) sin (x/2), b) cos (x/2), and c) tan (x/2) without solving for x, when 0 ≤ x ≤ 360°.
If sec x = −4, and x is in quadrant II.
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