Trigonometry Examples

$\cos (2 x) + \cos (4 x) = 2 \cos (x)$

Step 1

Graph each side of the equation.

$y = \cos (2 x) + \cos (4 x)$

$y = 2 \cos (x)$

Step 2

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