Apply de Moivre powers - official syllabus scenario
For a coastal survey complex number \(z=4\operatorname{cis}(50^\circ)\), find the argument of \(z^4\) in degrees. Enter the requested value and choose the interpretation that matches the result.
Worked practice: result and interpretation
Calculate the requested result first, then choose the interpretation that follows from it.
Write a full answer
Now write the response in full, in your own words — this is what the exam asks for. The AI marks it on the same moves you built above (focus, evidence, technique, judgement) and gives feedback on reasoning, evidence, and expression.