MCQ
$\sin \left(\cot ^{-1} x\right)=$
- A$\sqrt{1+x^2}$
- Bx
- C$\left(1+x^2\right)^{-3 / 2}$
- ✓$\frac{1}{\sqrt{1+x^2}}$
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| X | 2 | 3 | 4 | 5 |
| $P(X)$ | $\frac{5}{k}$ | $\frac{7}{k}$ | $\frac{9}{k}$ | $\frac{11}{k}$ |