The locus of points \(L_1\) satisfies the equation \(|z| = 2\)
The locus of points \(L_2\) satisfies the equation \(\arg(z + 4) = \frac{\pi}{4}\)
- Sketch \(L_1\) on the Argand diagram below.
\includegraphics{figure_18}
[1 mark]
- Sketch \(L_2\) on the Argand diagram above.
[1 mark]
- The complex number \(a + ib\), where \(a\) and \(b\) are real, lies on \(L_1\)
The complex number \(c + id\), where \(c\) and \(d\) are real, lies on \(L_2\)
Calculate the least possible value of the expression
$$(c - a)^2 + (d - b)^2$$
[3 marks]