I'm not sure what you mean by "on a (-pi, +pi) scale"...? Do you perhaps mean "on the interval from \(\displaystyle -\pi\) to \(\displaystyle +\pi,\), not including the endpoints"...? If so, please confirm. If not, please correct.how do i determine the roots of 3 sin (cubed) x+5sin (squared) x-2sinx=0 on a (-pi,+pi) scale?