estrella14tkm estrella14tkm
  • 26-05-2019
  • Mathematics
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What is the argument of -4+4i

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romannp
romannp romannp
  • 26-05-2019

the agrument of any complex number is defined as its angle.

if a complex number be Z=a+ib then the agrument of Z is given by,

Agr|Z|=A

where, tanA=b/a i.e. A=tan^-1(b/a)

by the question,

a=-4 and b=4

so A= tan^-1(4/-4)= tan^-1(-1)=135°

therefore the agrument of -4+4i is 135°

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