Question

How do you find the quadrants in which the terminal side of θ must lie given sinθ is positive and cosθ is negative?

Answer 1

learn a trick i.e..

ALL STATION TICKET COLLECTOR

here, all is 1 quadrant in which all is positive ,

station(sin) means 2 quadrant where sin is positive

tickect (tan) is 3 quadrant where tan is positive

collector ( cos &sec) is 4 one where both cos and sec are positive..