Trigonometry Examples

$\cos^{2} (x) - 2 \sin^{2} (x) = 2 \cos^{2} (x) - 1$

Step 1

Graph each side of the equation.

$y = \cos^{2} (x) - 2 \sin^{2} (x)$

$y = 2 \cos^{2} (x) - 1$

Step 2

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