2sinx=1
sinx/2=1
2sinx/2=1

1) 2sinx = 1 sinx = 1/2x = (-1)^n * arcsin1/2 + pi*nx = (-1)^n * pi/6 + pi*n, n € Z.2) sinx/2 = 1x/2 = pi/2 + 2pi*nx = pi + 4pi*n, n € Z.3) 2sinx/2 = 1sinx/2 = 1/2x/2 = (-1)^n * arcsin1/2 + pi*nx/2 = (-1)^n * pi/6 + pi*nx = (-1)^n * pi/3 + 2pi*n, n € Z