The curve $C$ is defined by

1. Show that

   $$\frac{d^{2}y}{d{x}^2}=\frac{1}{\sin 2x-1}$$

2. The point $P$ is the turning point of $C$. Find the coordinates of $P$, and determine whether this is a minimum or a maximum point.

For (b), you should use laws of logarithms first:

Use the second derivative test!

The coordinates of $P$ are of the form

If $P$ is a minimum point, give $5abcd$. If $P$ is a maximum point, give $7abcd$.