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| Graphical representation of Complex numbers |
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| The complex number Z = x + iy may be represented graphically by the point P whose rectangular co-ordinates are (x, y). Thus each point in the plane is associated with a complex number. In the figure, P defines Z = x + iy. It is customary to choose x-axis as real axis and y-axis as imaginary axis. |
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| Draw PM perpendicular to x-axis. |
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| In D POM, |
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| Here the positive value of r is called the modulus of Z or absolute value of Z. q is called the amplitude or argument of Z. |
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