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  • https://math.libretexts.org/Bookshelves/Linear_Algebra/Matrix_Analysis_(Cox)/06%3A_Complex_Analysis_I/6.01%3A_Complex_Numbers_Vectors_and_Matrices
    z1z2z1z2¯z2¯z2=x1x2+y1y2+i(x2y1x1y2)x22+y22 \[\begin{align*} z_{...z1z2z1z2¯z2¯z2=x1x2+y1y2+i(x2y1x1y2)x22+y22 z1z2=|z1||z2|(cos(θ1)cos(θ2)sin(θ1)sin(θ2)+i(cos(θ1)sin(θ2)+sin(θ1)cos(θ2)))=|z1||z2|(cos(θ1+θ2)+isin(θ1+θ2))

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