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Trigonometry Examples

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Verify the Identity (cos(x)+sin(x))/(cos(x)-sin(x))-(cos(x)-sin(x))/(cos(x)+sin(x))=2tan(2x)

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$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$

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