Question

How do you find the value of `sec (-450)`?

Answer 1

Find sec (-450)

Ans: undefined

Explanation:

`sec (-450) = 1/(cos -450)`. Find cos (-450).
cos (-450) = cos (-90 - 360) = cos (-90) = cos 90 = 0
Therefor, `sec (-450) = 1/cos 90 =` undefined