If $$\cos \theta = \frac{P^2 - 1}{P^2 + 1}, 0^\circ < \theta < 90^\circ$$, then $$\cosec \theta$$ is equal to:

A

$$\frac{2P}{1 - P^2}$$

B

$$\frac{2P}{1 + P^2}$$

C

$$\frac{1 + P^2}{2P}$$

D

$$\frac{1 - P^2}{2P}$$