Prove that $\frac{1}{1-\sin x}-\frac{1}{1+\sin x}=2 \tan x \sec x$

Prove that
$$\frac{1}{1-\sin x}-\frac{1}{1+\sin x}=2 \tan x \sec x.$$

Precalculus Trigonometry Equations
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Ering Ering
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