Friday, 26 April 2013

complex numbers - correctly found the angle phi (arg z)? left(frac(sqrt2isqrt2)(1isqrt3)4right)

1)((2i2)(1i3)4)=((223)+i(2(3)2)4)=((26)+i(62)4)=(264+i(62)4)



2)tgϕ=yx


3)tgϕ=6226=(62)(2+6)26=(6+2)(2+6)4=(6+2)24=6+212+24=8+2124=8+434=2+3

4)tgϕ=2+3


5)ϕ=arctg(2+3)



Are all agreed right?



If not - tell me where the error.



And yet, how to find arg z ???

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