PLEASE HELP!!!!!

tan(x/2)=sin(x/2)

sin(x/2) / cos(x/2) = sin(x/2) / 1

cos (x/2) = 1

x/2 = 0, 2pi, 4pi,6pi, .....

x= 0, 4pi, 8pi, 12pi,

so x = 4n*pi radians where n is any integer

you can do the degrees yourself.