Question

Question #5e4dc

Answer 1

`cos x = -12/13`

Explanation:

Reminder:
`tan (x) = - tan (-x)` --> `tan x = 5/12`
`tan x = sin x/(cos x)` --> `cos x = sin x/(tan x)`
In this case -->
`cos x = sin x/(tan x) = (-5/13)(12/5) = - 12/13`