Trigonometry Examples

$\tan (- \frac{15 π}{4})$

Step 1

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

$\tan (\frac{π}{4})$

Step 2

The exact value of $\tan (\frac{π}{4})$ is $1$ .

$1$