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Find the modulus and argument of the com...

Find the modulus and argument of the complex number `(1+2i)/(1-3i)`

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The correct Answer is:
`1/sqrt(2), (3pi)/4`
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NCERT BANGLISH-COMPLEX NUMBERS AND QUADRATIC EQUATIONS -MISCELLANEOUS EXERCISES ON CHAPTER 17
  1. Find the modulus and argument of the complex number (1+2i)/(1-3i)

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