Complex Analysis - Finding the image through a mapping

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SUMMARY

The discussion focuses on the rotation of the complex point 1 + i by an angle of π/6 about the origin. The initial angle of the point is calculated as arctan(1/1) = π/4. After applying the rotation, the new point in the w-plane is expressed as w = √2.exp(π/4 + π/6), which simplifies to w = √2(cos(5π/12) + i.sin(5π/12). The solution is confirmed as correct by participants in the discussion.

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  • Understanding of complex numbers and their representation
  • Knowledge of polar coordinates and exponential form of complex numbers
  • Familiarity with trigonometric functions and their properties
  • Basic knowledge of rotation transformations in the complex plane
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Homework Statement


The point 1 + i is rotated anticlockwise through [itex]\frac{∏}{6}[/itex] about the origin. Find its image.


The Attempt at a Solution



The point 1 + i creates an angle of arctan(1/1) = ∏/4

The rotation is by a further angle β = ∏/6.

So the new point w in the w-plane from the mapping would be:

w = r.exp(iθ + β)

w = √2.exp(∏/4 + ∏/6)
w = √2(cos 5∏/12 + i.sin 5∏/12)

Is this correct?
 
Physics news on Phys.org
looks correct yes
 
Thank you.
 

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