Complex Numbers 3 Question 2

2. If z is a complex number of unit modulus and argument θ, then arg1+z1+z¯ is equal to

(2013 Main)

(a) θ

(b) π2θ

(c) θ

(d) πθ

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Answer:

Correct Answer: 2. (c)

Solution:

  1. Given, |z|=1, argz=θz=eiθ

z¯=eiθz¯=1zarg1+z1+z¯=arg1+z1+1z=arg(z)=θ



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