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Lecture notes 2011 (slides), pdf.file - Katedra matematiky FEL ČVUT

Lecture notes 2011 (slides), pdf.file - Katedra matematiky FEL ČVUT

Lecture notes 2011 (slides), pdf.file - Katedra matematiky FEL ČVUT

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1.2. Věta. (Moivrova věta) Pro z = |z|(cos ϕ + j sin ϕ) platí<br />

Pˇríklad:<br />

z n = |z| n (cos nϕ + j sin nϕ) .<br />

(1 + j) n = √ 2 n (cos n π<br />

4<br />

• Binomická rovnice: z n = a<br />

π<br />

+ j sin n ) .<br />

4<br />

|z| n (cos nϕ + j sin nϕ) = |a|(cos ψ + j sin ψ)<br />

|z| = n |a| , nϕ = ψ + 2kπ ,<br />

ψ + 2kπ<br />

ϕ =<br />

n<br />

Stačí vzít k = 0, 1, . . . , n − 1.<br />

... vrcholy pravidelného n-úhelníka na kružnici |z| = n |a|.<br />

Jan Hamhalter http://math.feld.cvut.cz/hamhalte Matematika pro Kybernetiku <strong>Lecture</strong> Notes 10 / 369

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