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10 cards from this deck
It represents the magnitude of the complex number.
|z| = √(x² + y²) for z = x + iy.
It denotes the direction of the complex number.
-π < θ ≤ π.
As r cis θ, where cis θ = cos θ + i sin θ.
|z1 z2| = |z1| |z2|.
arg(z1 z2) = arg(z1) + arg(z2) + 2kπ, k ∈ Z.
Conjugate: z̄ = r cis (-θ).
z^n = r^n cis(nθ) for powers of complex numbers.
They visually represent complex numbers geometrically.
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