Convert (i) `tan^(-1)3,` (ii) `sin^(-1)(-1//3)` in terms of cosine inverse.

Explanation

To convert \( \tan^{-1}(3) \) and \( \sin^{-1}\left(-\frac{1}{3}\right) \) into terms of cosine inverse, we can follow these steps:

### Step 1: Convert \( \tan^{-1}(3) \)

Let \( \theta = \tan^{-1}(3) \). By definition, this means:

\[
\tan(\theta) = 3 = \frac{\text{opposite}}{\text{adjacent}} = \frac{3}{1}
...