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Complex Number Calculator

Arithmetic on complex numbers plus modulus, argument, conjugate, and rectangular ↔ polar conversion.

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Two-operand arithmetic

Accepts forms like 3+4i, -2i, 5, 1-i, 2.5 - 0.5i.

Single-number properties & conversion

Polar → rectangular

Enter magnitude r and angle θ. Result is r(cos θ + i·sin θ).