Trigonometry Examples

$\cos (18) = \sqrt{\frac{5 + \sqrt{5}}{8}}$

Step 1

The left side $0.95105651$ is equal to the right side $0.95105651$ , which means that the given statement is always true.

True

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