Cos x is negative and sin x is negative.Which of the following is true of x?
- 0o < x < 90o
- 90o < x <180o
-
180o < x < 270o
- 270o < x <360o
- -90o < x <90o
The correct answer is: C
Explanation
In the 3rd quadrant, only the tan of angles are positive.
The 3rd quadrant = 180° < x < 270°