JEE MATHEMATICS MCQ: TRIGONOMETRIC EQUATIONS

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Analyzing +4 | -1

If the expression

n \sin ^2 \theta+2 n \cos (\theta+\alpha) \sin \alpha \sin \theta

+\cos 2(\alpha+\theta)

is independent of

\theta

, then the value of

n

View answer and explanation

Correct option: B

Option A (2) is correct because setting n=2 makes the expression independent of theta, as the theta-dependent terms cancel out.

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