What is the area under the curve in the interval [2,7] for the function 1/(1 + x^2)^(1/2) ?

${\int}_{2}^{7} \frac{1}{\sqrt{1 + {x}^{2}}} \mathrm{dx} = {\sinh}^{-} 1 \left(7\right) - {\sinh}^{-} 1 \left(2\right) = 1.20$ (3sf)
${\int}_{2}^{7} \frac{1}{\sqrt{1 + {x}^{2}}} \mathrm{dx} = {\sinh}^{- 1} x {|}_{2}^{7} = {\sinh}^{-} 1 \left(7\right) - {\sinh}^{-} 1 \left(2\right)$