Question

Question #995f2

Answer 1

`-2.0`

Explanation:

`sec(-120°)`

on the calculator:
`cos-120` then press `1/x=-2.0`

or:

`:.=1/(Cos(-120))`

`:.=1/-0.5`

`:.=1/(-5/10`

`:.=1/(-1/2)`

`:.=1/1-:-1/2`

`:.=1/1 xx -2/1`

`:.=-2`