Question

Using the unit circle, how do you find the value of the trigonometric function: sec 3 (pi) / 2?

Answer 1

Find `sec ((3pi)/2)`

Explanation:

`sec ((3pi)/2) = 1/ cos ((3pi)/2)` .
On the trig unit circle: `cos ((3pi)/2) = 0.`
Therefor: `sec ((3pi)/2) = 1/0` --> undefined.