Question

What is the value of cos inverse
( cos 3)?

Answer 1

$$\begin{gathered} {\cos }^{-1}\left(\cos 3\right) \\ \mathrm{Here}3\mathrm{is}\mathrm{in}\mathrm{degree}. \\ \mathrm{so},{\cos }^{-1}\left(\cos 3\right)=3. \\ \mathrm{So},\mathrm{value}\mathrm{of}{\cos }^{-1}\left(\cos 3\right)\mathrm{is}3. \end{gathered}$$