Trigonometrymedium · Past Paper
If sin (A - B) = 1/2 and cos (A + B) = 1/2, find A and B.
AA=45, B=15
BA=60, B=30
CA=30, B=30
DA=45, B=45
✓ Correct Answer: A — A=45, B=15
A-B = 30 and A+B = 60. Adding them gives 2A = 90, so A = 45 and B = 15.
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