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Paragraph: Let z= 1+i 1-i where i= -1 Question: What is angle such that z is purely imaginary? where n is an integer

Options

  1. An 2
  2. B(2 n+1) 2
  3. Cn
  4. D2 n

Correct answer

B. (2 n+1) 2

Step-by-step solution

If z is purely imaginary. array ll ^2 1+ ^2 =0 & ^2 =0 =0 & =(2 n+1) 2 array Where n is an integer.

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