Trigonometry Examples

$\cos (A + B) \cdot \cos (A) + \sin (A + B) \cdot \sin (A)$

Step 1

Graph.

$\cos (A + B) \cdot \cos (A) + \sin (A + B) \cdot \sin (A)$

Step 2

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