If sinθ<0 and cosθ>0 , then the terminal side of θ must be in which quadrant? In which quadrant(s) must the terminal side of angle θ lie if the product of sinθ and tanθ is positive?

Answer 1

quadrant IV is sines are negative and cosines positive

if their product is positive, they're either both positive and in Quadrant I

or they're both negative and in Quadrant III