Numerical integration

[Joe Horn]

In CAS, use a lowercase "x" for the variable, and use "1." (instead of "1") for the lower limit, and you'll get 0.620536603447 which is the correctly rounded answer. Including a decimal point forces a numeric result instead of a symbolic result.

Or you can use "1" as the lower limit, press Enter, and then press the [a b/c] key to approximate it.

Or change the "Exact" mode in CAS Settings to OFF.