Algebra Examples

$\sec (- 420 °)$

Step 1

Add full rotations of $360$ ° until the angle is between $0$ ° and $360$ °.

$\sec (300)$

Step 2

Apply the reference angle by finding the angle with equivalent trig values in the first quadrant.

$\sec (60)$

Step 3

The exact value of $\sec (60)$ is $2$ .

$2$