Trigonometry Examples

$2 \cos^{2} (105) - 1 = \cos (210)$

Step 1

The left side $- 0.8660254$ is equal to the right side $- 0.8660254$ , which means that the given statement is always true.

True

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