Question

If cos θ > 0 and tan θ > 0, which of the following statements MUST be true? (5 points)

A) θ lies in Quadrant I
B) sin θ < 0
C) θ lies in Quadrant II
D) θ lies in Quadrant IV

Answer 1

Yo sup??

cosx>0 in the 1st and 4th quadrant.

tanx>0 in the 1st and 3rd quadrant.

therefore the common solution is x lies in 1st quadrant.

Hence the correct answer is option A.

Hope this helps