Question

How do you use a calculator to evaluate `cos^-1 0.34` in both radians and degree?

Answer 1

`cos^-1(0.34)=1.2238(4dp)`radian.
`cos^-1(0.34)=70.1231(4dp)`degree.

Explanation:

Using "inv" button with radian and degree mode for `cos^-1` we get,
`cos^-1(0.34)=1.2238(4dp)`radian.
`cos^-1(0.34)=70.1231(4dp)`degree.[Ans]