title 'Task2'
x = -2*pi:0.001:2*pi
p1 = x < -pi/2
p2 = (-pi/2 <= x ) & (x <= pi/2)
p3 = pi/2 < x
plot(x,sin(x).*p1 + (-1 + (2/pi)*(x + pi/2)).*p2 + 1.*p3)