MCQ
$\int\frac{\text{dx}}{1+\text{cos x}}=$
- ✓$\tan\frac{\text{x}}{2}+\text{k}$
- B$\frac{1}{2}\tan\frac{\text{x}}{2}+\text{k}$
- C$2\tan\frac{\text{x}}{2}+\text{k}$
- D$\tan^2\frac{\text{x}}{2}+\text{k}$
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$f(x)=\left\{\begin{array}{cc}x^2 \sin \left(\frac{\pi}{x^2}\right) & \text { if } x \neq 0 \\ 0, & \text { if } x=0\end{array}\right.$
Then which of the following statements is $TRUE$?