$A$ transformer works on the principle of

The branched tree-like structure present in the cerebellum is known as:

$\sinh^{-1}\left(\frac{x}{\sqrt{1-x^2}}\right)$ is equal to

If $3 \sin x + 4 \cos x = 5$,then $6 \tan \frac{x}{2} - 9 \tan^2 \frac{x}{2}$ is equal to

The sulphate of a metal $M$ contains $9.87 \%$ of $M$. This sulphate is isomorphous with $ZnSO_4 \cdot 7 H_2 O$. The atomic weight of $M$ is (in $.3$)

In which of the following reactions is the product an ether?