A2. Which interval is the range of values of the function $f(x)=\cos x+1-\pi$?
(A) $[-1+\pi, 2]$
(B) $[0, \pi+2]$
(C) $[-\pi, 2-\pi]$
(D) $[-\pi, 1+\pi]$
(E) $[1-\pi, 2-\pi]$
A2. The range of the cosine function is the interval $[-1,1]$, hence it follows that the range of the function $f$ is the interval $[-\pi, 2-\pi]$.