Precalculus Examples

$1 - \cos (x) + 1 + \cos (x)$

Step 1

Combine the opposite terms in $1 - \cos (x) + 1 + \cos (x)$ .

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Step 1.1

Add $- \cos (x)$ and $\cos (x)$ .

$1 + 0 + 1$

Step 1.2

Add $1$ and $0$ .

$1 + 1$

Step 2

Add $1$ and $1$ .

$2$