numeric approximation



My experiment:

(%i1) f(t):=''(integrate(1/(sin(x)^2+log(x)),x,1,t));
                                 t
                                /
                                [         1
(%o1)                   f(t) := I  ---------------- dx
                                ]     2
                                /  sin (x) + log(x)
                                 1
(%i2) f(5), numer;
                             5
                            /
                            [         1
(%o2)                       I  ---------------- dx
                            ]     2
                            /  sin (x) + log(x)
                             1
It seems that (%i1) correctly define a function f(t) and maxima is
indeed able to derive it. Why (%o2) does not give a numeric
approximation of f(5)? What I have to do to get it? How can I plot f?

Olive