Evaluate ∫0111+x2dx\int_{0}^{1} \frac{1}{\sqrt{1+x^2}} dx∫011+x21dx.
ln(1+2)\ln(1+\sqrt{2})ln(1+2)
arcsin(1)\arcsin(1)arcsin(1)
ln(2)\ln(\sqrt{2})ln(2)
ln(2)\ln(2)ln(2)