Quick questions on The complex plane, modulus and argument (WACE Year 12 Mathematics Specialist Unit 3)

Q: What is argument outside the principal range?

SCSA usually wants Arg z (-π, π]. An answer of 4π3 should be written as -2π3.

2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is argument outside the principal range?

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SCSA usually wants

\operatorname{Arg} z \in (-\pi, \pi]

. An answer of

\tfrac{4\pi}{3}

should be written as

-\tfrac{2\pi}{3}

What is degrees on the calculator?

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Work in radians for the principal argument.

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