MCQ
cosec $^{2} \mathrm{A}$ बराबर होगा ?
- A$\frac{1-\cos ^{2} A}{1+\cos ^{2} A}$
- B$\frac{1+\cos ^{2} A}{1+\cot ^{2} A}$
- ✓$\frac{\sin ^{2} A+\cos ^{2} A}{1-\cos ^{2} A}$
- D$\frac{\sin ^{2} A+\cos ^{2} A}{1+\sin ^{2} A}$
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