Question: if tan a = -15/8, 270 degrees < a < 360 degrees, then find the exact value of each a) sin a/2 b) cos a/2

if tan a = -15/8, 270 degrees < a < 360 degrees, then find the exact value of each a) sin a/2 b) cos a/2 c) tan a/2 use radicals as needed and rationalize denominators

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