True
1) Let's evaluate that, using one identity for that:
[tex]\begin{gathered} \cos (\cos ^{-1}(2))= \\ \cos (\cos ^{-1}(\theta))=\theta \\ \cos (\cos ^{-1}(2))=2 \end{gathered}[/tex]2) Since the cosine of the arc cosine (theta) is equal to theta, we can state that this trigonometric equation is true.
3) Hence, that's true.
