Algebra Examples

$\cos^{2} (2 π)$

Step 1

Subtract full rotations of $2 π$ until the angle is greater than or equal to $0$ and less than $2 π$ .

$\cos^{2} (0)$

Step 2

The exact value of $\cos (0)$ is $1$ .

$1^{2}$

Step 3

One to any power is one.

$1$