1.If Zr=sin2πr11−icos2πr11Z_r = \sin \frac{2\pi r}{11} - i \cos \frac{2\pi r}{11}Zr=sin112πr−icos112πr, then ∑r=010Zr\sum_{r=0}^{10} Z_r∑r=010Zr is equal toa.−1-1−1b.000c.iiid.−i-i−iLogin to continueOnly logged in users canattempt or see the solution.
