text: i really don't know how to start them plze help me i'll give u full 10 points? the roots of eq: {(x)^n}-1=0 are called nth roots of unity. let these roots be denoted by 1,a,a1,a2........a(n-1)   1=e^(i2rpi)          (r=0,1,2,3.......)  answer following- 1) value of (1-a1) (1-a2).......(1-a(n-1))is ? 2) value of sin pi/n,sin 2pi/n,sin3pi/n,........sin(n-1)pi/nis ? 3) value of a1*a2*a3*...........*a(n-1)=? 4) if a be the nth complex root of unity then (x+b)+(x2+b)a+(x3+b)a^2................+(xn+b)a^(n-1) 2) value of sin pi/n,sin 2pi/n,sin3pi/n,........sin(n-1... ?