Question Practice

Qn #656
If ${{x}}_k=\cos \Bigg{(}\frac{2\pi k}{n}\Bigg{)}+i\sin \Bigg{(}\frac{2\pi k}{n}\Bigg{)}$ , then $\sum ^n_{k=1}({{x}}_k)=?$
    ❓ Question: If ${{x}}_k=\cos \Bigg{(}\frac{2\pi k}{n}\Bigg{)}+... | TANCET Group Studies | Tancet Group Studies