Question

How do you find the value of `sec (-330)`?

Answer 1

Find `sec (-330^@)`

Ans: `(2sqrt3)/3`

Explanation:

sec (-330) = 1/(cos (-330). First, find cos (-330).
cos (-330) = cos (30 - 360) = `cos 30^@` = sqrt3/2. (Trig Table)
Therefor, `sec (-330) = 1/(cos (30)) = 2/sqrt3 = (2sqrt3)/3`