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Precalculus Examples

Popular Problems

Find the Exact Value cos(arccos(-0.2))

$\cos (\arccos (- 0.2))$

Step 1

The functions cosine and arccosine are inverses.

$- 0.2$

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

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