# The vicious cycle (3)

Geometry Level 4

This is problem 3.

Let a real $$x$$ be such that $$\sec x=\sqrt {P_{2}}.$$

Find $$AB$$ where

$$A=\frac {\sin x}{1-\sin x}$$

$$B=\frac {\sin x}{1+\sin x}$$

If you are lost, look here

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