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bb"Statement-1" If the principal argumen...

`bb"Statement-1"` If the principal argument of a complex numbere z is 0, the principal argument of `z^(2) " is " 2theta`.
`bb"Statement-2" arg(z^(2))=2arg(z)`

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Statement-1: for any non-zero complex number z, |z/|z|-1| le "arg"(z) Stetement-2 :sintheta le theta for theta ge 0