GCEFurther MathematicsTrigonometry and Circular Measure2020

Simplify $\frac{\sin 2\theta}{1 + \cos 2\theta}$.

A$\cot\theta$
B$\tan\theta$CORRECT
C$2\sin\theta$
D$2\cos\theta$
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Why the answer is B, and why the others tempt you.
Using double angle identities: sin 2θ = 2 sin θ cos θ and 1 + cos 2θ = 2cos²θ. The expression becomes 2 sin θ cos θ / 2cos²θ = sin θ / cos θ = tan θ. Option A is the reciprocal of the correct answer.
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