Cos x is negative and sin x is negative Which o... - WAEC Mathematics 1998 Question
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 option: c
In the 3rd quadrant, only the tan of angles are positive.
The 3rd quadrant = 180° < x < 270°
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