Trigonometry Examples

$\frac{(1 - \cos (θ)) (1 + \cos (θ))}{(1 - \sin (θ)) (1 + \sin (θ))}$

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$\frac{(1 - \cos (θ)) (1 + \cos (θ))}{(1 - \sin (θ)) (1 + \sin (θ))}$