• Caught error while evaluating the code in this question: syntax error, unexpected '$b' (T_VARIABLE) on line 3 of Common Control

 ∫0()∫0()yx2dydx\displaystyle {\int_{{0}}^{{()}}}{\int_{{0}}^{{()}}}\frac{\sqrt{{{y}}}}{{{x}^{{2}}}}{\left.{d}{y}\right.}{\left.{d}{x}\right.}  \displaystyle

 \displaystyle

 z=arcsin⁡x+arcsin⁡y\displaystyle {z}={\arcsin{{x}}}+{\arcsin{{y}}} 

The part of the Surface z=arcsin(x)+arccos(x). Shown is a slanted but almost flat part of that surface that lies in front of the verticle planes y = 1/2 and x = 0.5.
Provide an exact answer:  < 

Now numerical calculation to 5 decimal places:  i

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