Trigonometry Examples

$\cos (\frac{π}{4}) = \sqrt{\frac{2}{2}}$

Step 1

The left side $0.70710678$ does not equal to the right side $1$ , which means that the given statement is false.

False

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