Tentukan bayangan titik p(2,-3) oleh rotasi (0° 90°)

[tex] \frac{x'}{y'} = \left[\begin{array}{ccc}cos 90&- sin 90\\sin 90&cos 90\\\end{array}\right] \left[\begin{array}{ccc}2\\-3\\\end{array}\right] -\ \textgreater \ \frac{x'}{y'} = \left[\begin{array}{ccc}0&-1\\1&0\\\end{array}\right] \left[\begin{array}{ccc}2\\-3\\\end{array}\right] = (3,2)[/tex]

Jadi bayangan titik p (3,2)