MCQ
$\sin ^{-1}\left(\frac{1}{\sqrt{a+1}}\right)=\ldots \ldots \ldots . .(a>0)$
- A$\tan ^{-1}\left(\frac{1}{\sqrt{a+1}}\right)$
- B$\tan ^{-1}\left(\frac{1}{\sqrt{a-1}}\right)$
- ✓$\tan ^{-1}\left(\frac{1}{\sqrt{a}}\right)$
- D$-\tan ^{-1} \frac{1}{\sqrt{a}}$