Trigonometry Examples

$\cos (40) = \frac{5}{r}$

Step 1

Since the left side does not equal the right side, the equation is not an identity.

$\cos (40) = \frac{5}{r}$ is not an identity.

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