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Question

Find the modulus and argument of the following complex numbers and hence express each of them in the polar form:
161+i3

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Solution

z=161+i3

=161+i3×161i3161i3

=16(1i3)12i2(3)2

=16+i1631+3

=4+i43

z=a+ib=4+i43


mod=|z|=a2+b2=(4)2+(43)2=64=8

tan1ba

=tan1434=3=60

θ=18060=30

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