Trigonometryhard · Past Paper
Simplify (sin 5A - sin 3A) / (cos 5A + cos 3A).
Atan A
Btan 4A
Ctan 2A
Dcot A
✓ Correct Answer: A — tan A
Using sum-to-product formulas: (2 cos 4A sin A) / (2 cos 4A cos A) = tan A.
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