Answer
$1.108230308$
Work Step by Step
$y=$arccos $0.44624593=\cos^{-1} 0.44624593$
Ensuring that the calculator is in radians, we type $\cos^{-1} 0.44624593$ into the calculator and solve:
$\cos^{-1} 0.44624593\approx1.108230308$
Therefore, $y=$arccos $0.44624593\approx1.108230308$.
