Trigonometrymedium · Past Paper
Convert sin 2A in terms of tan A.
A2 tan A / (1 - tan² A)
B2 tan A / (1 + tan² A)
C(1 - tan² A) / (1 + tan² A)
Dtan A / (1 + tan² A)
✓ Correct Answer: B — 2 tan A / (1 + tan² A)
This is the sine double angle identity expressed in terms of the tangent function.
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