Cos x is negative and sin x is negative.Which of the following is true of...
MATHEMATICS
WAEC 1998
Cos x is negative and sin x is negative.Which of the following is true of x?
- A. 0o< x< 90o
- B. 90o< x <180o
- C. 180o< x< 270o
- D. 270o< x <360o
Correct Answer: C. 180o< x< 270o
Explanation
In the 3rd quadrant, only the tan of angles are positive.
The 3rd quadrant = 180° < x < 270°
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