Trigonometrymedium · Past Paper
Simplify cos(A - B) - cos(A + B).
A2 sin A sin B
B2 cos A cos B
C2 sin A cos B
D2 cos A sin B
✓ Correct Answer: A — 2 sin A sin B
Expanding both and subtracting results in 2 sin A sin B.
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✓ Correct Answer: A — 2 sin A sin B
Expanding both and subtracting results in 2 sin A sin B.
Share this question