Question

Question #5c6af

Answer 1

`(5pi)/6; (7pi)/6`

Explanation:

`cos x = (-sqrt3/2)`
Trig Table of special arcs gives -->
cos x = (-sqrt3/2) --> x = (5pi)/6
Trig unit circle give another x that has the same cos value -->
`x = - (5pi/6)`, or `x = pi + pi/6 = (7pi)/6` (co-terminal)
Answers:
`(5pi)/6, (7pi)/6`