MCQ
$\int \tan \left(\sin ^{-1} x\right) \cdot d x=$
- A$\left(1-x^2\right)^{-\frac{1}{2}}+c$
- B$\left(1-x^2\right)^{\frac{1}{2}}+c$
- C$\frac{\tan ^m X }{\sqrt{1-x^2}}+c$
- ✓$-\sqrt{1-x^2}+c$
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The angle between the lines
$\vec{r}=(4 \hat{i}-\hat{j})+s(2 \hat{i}+\hat{j}-3 \hat{k})
and (\vec{r}=(\hat{i}-\hat{j}+2 \hat{k})+t(\hat{i}-3 \hat{j}+2 \hat{k})$ is