Trigonometrymedium · Past Paper
If tan A = x, then sin 2A is:
A2x / (1+x^2)
B2x / (1-x^2)
C(1-x^2) / (1+x^2)
Dx / (1+x^2)
✓ Correct Answer: A — 2x / (1+x^2)
sin 2A in terms of tan A is 2 tan A / (1 + tan^2 A).
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