Převeď stupně na radiány:
\( 90° \)
\( 180° \ =\ \frac{\pi}{4}\ \textrm{rad} \)
\( 90°\ =\ \frac{\pi}{8}\ \textrm{rad} \)
\( 180° \ =\ 2\pi\ \textrm{rad} \)
\( 90°\ =\ \frac{\pi}{3}\ \textrm{rad} \)
\( 180° \ =\ π\ \textrm{rad} \)
\( 90°\ =\ \frac{\pi}{2}\ \textrm{rad} \)
\( 180° \ =\ \frac{3\pi}{2}\ \textrm{rad} \)
\( 90°\ =\ \pi\ \textrm{rad} \)
