Math Complex plane Formulas
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The point M(a,b) represent the complex number a + bi
r = OM = a + bi = √(a2+b2) : modules
φ : argument
tan φ = b / a;
cos φ = a / √(a2+b2)
sin φ = b / √(a2+b2)
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Trigonometric Form of Complex Number
a + bi = r( cos φ + i sin φ )
[r(cos φ + i sin φ)]n = rn(cos φ + i sin φ)
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