Practice problem
Define a function fff via f(x)=cos−1(x)f(x) = \cos^{-1}(x)f(x)=cos−1(x). Which of these could be the range of fff?
(−π,π)(-\pi, \pi)(−π,π)
[−π2,π2)[-\frac{\pi}{2}, \frac{\pi}{2})[−2π,2π)
[0,π)[0, \pi)[0,π)
[0,2π)[0, 2\pi)[0,2π)
[−π,π)[-\pi, \pi)[−π,π)
Type a concept, like “slope” or “photosynthesis”.