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Precalculus Examples

Popular Problems

Simplify sec(18)^2-tan(18)^2

$\sec^{2} (18) - \tan^{2} (18)$

Step 1

Apply pythagorean identity.

$1$

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

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