MCQ
$\int_{}^{} {{{\tan }^{ - 1}}\sqrt {\frac{{1 - \cos 2x}}{{1 + \cos 2x}}} } \;dx = $
- A$2{x^2} + c$
- B${x^2} + c$
- ✓$\frac{{{x^2}}}{2} + c$
- D$2x + c$
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| $X = x_i$ | $0$ | $1$ | $2$ | $3$ |
| $P(X = X_i)$ | $k$ | $3k$ | $3k$ | $k$ |