9709 P31 - Jun 2013 - Q7
1993
(a) Without using a calculator, solve the equation
\(3w + 2iw^* = 17 + 8i\),
where \(w^*\) denotes the complex conjugate of \(w\). Give your answer in the form \(a + bi\).
(b) In an Argand diagram, the loci
\(\arg(z - 2i) = \frac{1}{6}\pi\) and \(|z - 3| = |z - 3i|\)
intersect at the point \(P\). Express the complex number represented by \(P\) in the form \(re^{i\theta}\), giving the exact value of \(\theta\) and the value of \(r\) correct to 3 significant figures.
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