MCQ
$\int\frac{\text{a}}{(1+\text{x}^2)\tan^{-1}\text{x}}\text{dx}=$
- ✓$\text{a}\log|\tan^{-1}\text{x}|+\text{c}$
- B$\frac{1}{2}(\tan^{-1}\text{x})^2+\text{c}$
- C$\text{a}\log(1+\text{x}^2)+\text{c}$
- DNone of these
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$\frac{d y}{d x}+12 y=\cos \left(\frac{\pi}{12} x\right), y(0)=0 .$
Then, which of the following statements is/are $TRUE$?