Y' = -sin(x/2)(1/2) 2cos(x/2)Y' = -sin(x/2) cos(x/2)Y' = -sin(x/2) cos(x/2)Y' = -1/2 sin(x)Y' = -1/2 * sin(x)
Y' = -sin(x/2)(1/2) 2cos(x/2)
Y' = -sin(x/2) cos(x/2)
Y' = -sin(x/2) cos(x/2)
Y' = -1/2 sin(x)
Y' = -1/2 * sin(x)