tana=3/4 sin2a= If a is the fourth quadrant angle, Tana = 3 / 4, then sin2a=

tana=3/4 sin2a= If a is the fourth quadrant angle, Tana = 3 / 4, then sin2a=

The fourth quadrant is Sina = - 3 / 5 cosa = 4 / 5
sin2a=2sinacosa=2*(-3/5)*(4/5)=-24/25