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MATEMATIKA 1 Senka Banic PREDAVANJA (grupa G1): utorak i ...

MATEMATIKA 1 Senka Banic PREDAVANJA (grupa G1): utorak i ...

MATEMATIKA 1 Senka Banic PREDAVANJA (grupa G1): utorak i ...

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Trigonometrijski oblik kompleksnog brojaSvaki z = x+iy 2 C u Gaussovoj ravnini jednoznacnoje odre ¯den sa: r = d ( O (0; 0) ; T (x; y) ) 2 [0; 1i ; ' = ^ OT ; x os 2 [0; 2i(kut s pozitivnim smjerom xosi).Kut' = arg znazivamo argument kompleksnog broja z. arg 0 def.= 0:Budući da jex = Re z = r cos 'y = Im z = r sin ';onda jez = r cos ' + ir sin ' = r (cos ' + i sin ')trigonometrijski oblik kompleksnog broja, gdje jer = jzj = p x 2 + y 2 ;tg ' = tg (arg z) = y x :

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