List questions from complex-numbers

Published on 12 Apr 2026 - 19:21

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Prove that $\sum_{k=1}^{\frac{n-1}{2}}\cos\left(\frac{2\pi k}{n}\right)=-\frac{1}{2}$ if $n=1\mod 2$

Published on 18 Apr 2026 - 18:30

115

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Polar Coordinate usind De Moivre’s Theorem

Published on 12 Apr 2026 - 16:41

769

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Equilateral triangle from complex numbers

Published on 10 Apr 2026 - 9:10

485

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Arg(z) from $z^n$

Published on 09 Apr 2026 - 21:01

148

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Complex Equations

Published on 11 Apr 2026 - 11:24

93

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Factoring a complex polynomial

Published on 11 Apr 2026 - 5:22

164

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Convergence of infinite series of complex numbers

Published on 11 Apr 2026 - 16:04

66

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square of complex numbers

Published on 10 Apr 2026 - 17:06

508

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Is ring of Gaussian rationals in unique factorization domain?

Published on 10 Apr 2026 - 7:59

109

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Complex numbers - locii

Published on 08 Apr 2026 - 22:37

176

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rationalize the complex number multiplication rule

Published on 10 Apr 2026 - 6:21

1.9k

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Equality of complex numbers

Published on 09 Apr 2026 - 15:20

341

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Construction of Hyper-Complex Numbers

Published on 17 Apr 2026 - 15:29

640

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Writing the complex number $z = 1 - \sin{\alpha} + i\cos{\alpha}$ in trigonometric form

Published on 13 Apr 2026 - 3:45

List Question

Interpret to a complex plane!

Prove that $\sum_{k=1}^{\frac{n-1}{2}}\cos\left(\frac{2\pi k}{n}\right)=-\frac{1}{2}$ if $n=1\mod 2$

Polar Coordinate usind De Moivre’s Theorem

Equilateral triangle from complex numbers

Arg(z) from $z^n$

Complex Equations

Factoring a complex polynomial

Convergence of infinite series of complex numbers

square of complex numbers

Is ring of Gaussian rationals in unique factorization domain?

Complex numbers - locii

rationalize the complex number multiplication rule

Equality of complex numbers

Construction of Hyper-Complex Numbers

Writing the complex number $z = 1 - \sin{\alpha} + i\cos{\alpha}$ in trigonometric form

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