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Determinati forma algebrica a numarului complex z= 3*(cos 5π/6 - i*sin5π/6) Un mic ajutor dau coroana !!!

Determinati Forma Algebrica A Numarului Complex Z 3cos 5π6 Isin5π6 Un Mic Ajutor Dau Coroana class=

Răspuns :

π/6=30g
5π/6=150g∈cadranul2
cos5π/6=- √3/2  sin5π/6=1/2
z=3*(-√3/2-i/2)=-3√3/2-3i/2