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OpenStudy (anonymous):
compute modulus and argument a.1+i b.4-4i c.2+5i
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OpenStudy (alexwee123):
argument is arctan(y/x) for a complex number x + iy
OpenStudy (anonymous):
1+i = sqrt 2 (modulus) 4-4i = sqrt(4^2+4^2) = sqrt32
OpenStudy (alexwee123):
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