Answer
$0.83798122$
Work Step by Step
$y=$arctan $1.1111111=\tan^{-1} 1.1111111$
Ensuring that the calculator is in radians, we type $\tan^{-1} 1.1111111$ into the calculator and solve:
$\tan^{-1} 1.1111111\approx0.83798122$
Therefore, $y=$arctan $1.1111111\approx0.83798122$.
