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Question

Express in the modulus and amplitude form.(1+i)2n+1(1i)2n1, where n belongs to natural number.

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Solution

(1+i)2n+1(1i)2n1
Multiplying both numerator and denominater by (1+1)2n1
(1+i)2n+1(1i)2n1(1i)2n1(1+i)2n1(1+i)2n+1{(1i)(1i)}2n1{(1+i)2}2n(2)2n1{1+i2+2i}2n(2)2n1[i2=1 so i2+1=0](2i)2n(2)2n122n(i2)n22n12×(1)n2×(2)n

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