Trigonometry Examples

$\cos (25) + \cos (65) = 2 \cos (45) \cos (20)$

Step 1

The left side $1.32892604$ is equal to the right side $1.32892604$ , which means that the given statement is always true.

True

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