# How do you use a calculator to evaluate tan^-1 (2.25) in both radians and degree?

${66}^{\circ} 04 \mathmr{and} 0.37 \pi$
${\tan}^{-} 1 \left(2.25\right)$ --> arctan (2.25)
tan x = 2.25 --> arc $x = {66}^{\circ} 04$
$\frac{\pi \left(66.04\right)}{180} = 0.37 \pi$