Question

Z1 = 7-71
Represente a forma Geometnica
e trigonometrica de z1​

Answer 1

z1=7 -7i => a=7, b=-7 => (4°Quadrante)

p=√a²+b²=√49+49= √2.49= 7√2

tgx = b/a =-7/7= -1 => x=315° ou 7π/4

z=p.(cosx + i.senx)

z=7√2.(cos 7π/4 + i.sen 7π/4) ✓