Class 11MathematicsTrigonometrical Ratios, Functions and IdentitiesFundamental trigonometrical ratios and functions, Trigonometrical ratio of allied angles
Easy$\frac{1}{1+\sin \theta}+\frac{1}{1-\sin \theta} = $
- A$2 \cos ^2 \theta$
- B$-2 \cos ^2 \theta$
- C$2 \tan ^2 \theta$
- D$2 \sec ^2 \theta$
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