Multiple Choice
Find the exact value, given that sin A = -4/5 with A in quadrant IV, tan B = 7/24 with B in quadrant III, and cos C = - 5/13
with C in quadrant II.
-cos 2C
A)
B)
C)
D)
Correct Answer:
Verified
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-tan 2x =
-2 cot 2x cos x