Question

Cos x= -1/2 lies in the third quadrant .
Find the other trigonometric values

Answer 1

third qadrant only tan or cot positive other trigonmetric are negative

Answer 2

since it is in the third quadrant, only tan and cot will be positive and other T. Rs will be negative.
since cos = B/H
by Pythagoras,
H^2 = P^2+B^2
4= P^2 + 1
P = √3
Now,
sin x = -√3/2
tan x = √3/-1
cot x = 1/√3
cosec x = -2/√3
sec x = 2/-1

hope this helps you buddy!
Cheers!!!