\(\because\) 1° = \(\frac{\pi}{180}\) radian
& 1° = 60' (60' minute)
\(\therefore\) 1' = (\(\frac1{60}\))°
⇒ 15' = (15/60)' = (1/4)'
\(\therefore\) 33°15' = 33° + (1/4)° = (33 + 1/4)°
= \((\frac{132+1}4)\)° = \((\frac{133}4)\)°
= \(\frac{133}4\times\frac{\pi}{180}\) radian (\(\because 1° = \frac{\pi}{180}\) radian)
= \(\frac{133\pi}{720}\) radian
