Precalculus Examples

$\cos (x + π) - \cos (x) - 1 = 0$

Step 1

Graph each side of the equation. The solution is the x-value of the point of intersection.

$x = \frac{2 π}{3} + 2 π n, \frac{4 π}{3} + 2 π n$ , for any integer $n$

Step 2