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Question
Find the modulus and amplitude of the following complex numbers.
3
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Solution
Let z = 3 = 3 + 0i.
∴ a = 3, b = 0
∴ z is a real number, it lies on the positive real axis.
∴ |z| = `sqrt(a^2 + b^2)`
= `sqrt(3^2 + 0^2)`
= `sqrt(9 + 0)`
= 3
and amp (z) = 0.
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