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Precalculus Examples

Popular Problems

Factor cos(2x)cos(x)-sin(2x)sin(x)

$\cos (2 x) \cos (x) - \sin (2 x) \sin (x)$

Step 1

$\cos (2 x) \cos (x) - \sin (2 x) \sin (x)$

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

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