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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