If z = 2 + 2i, find the argument of z.

Practice Questions

Q1
If z = 2 + 2i, find the argument of z.
  1. π/4
  2. π/2
  3. 3π/4
  4. 0

Questions & Step-by-Step Solutions

If z = 2 + 2i, find the argument of z.
  • Step 1: Identify the complex number z, which is given as z = 2 + 2i.
  • Step 2: Recognize that the argument of a complex number is the angle it makes with the positive x-axis in the complex plane.
  • Step 3: The real part of z is 2 and the imaginary part is also 2.
  • Step 4: Use the formula for the argument, which is given by the tangent of the angle: tan(θ) = imaginary part / real part.
  • Step 5: Substitute the values: tan(θ) = 2 / 2.
  • Step 6: Simplify the fraction: tan(θ) = 1.
  • Step 7: Find the angle whose tangent is 1. This angle is θ = tan^(-1)(1).
  • Step 8: The angle θ = π/4 radians (or 45 degrees).
  • Step 9: Therefore, the argument of z is π/4.
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