Trigonometrymedium · Past Paper
Which of the following is tan(2A)?
A2 tan A / (1 + tan^2 A)
B2 tan A / (1 - tan^2 A)
Ctan^2 A / (1 - tan A)
D2 tan A
✓ Correct Answer: B — 2 tan A / (1 - tan^2 A)
This is the standard formula for the tangent of a double angle.
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