`
Voorbeeld
Uitwerking
$
\eqalign{
& k:3x - 2y = 5 \to rc_k = 1\frac{1}
{2} \cr
& \tan \alpha = 1\frac{1}
{2} \to \alpha \approx 56,31^\circ \cr
& l:4x - 3y = 6 \to rc_l = 1\frac{1}
{3} \cr
& \tan \beta = 1\frac{1}
{3} \to \beta \approx 53,13^\circ \cr
& \varphi = \alpha - \beta \approx 56,31^\circ - 53,13^\circ \approx 3,2^\circ \cr}
$