> pcl := 1/(Pi * sqrt(1-x^2));

                                            1
                              pcl := --------------
                                              2 1/2
                                     Pi (1 - x )
--------------------------------------------------------------------------------
> int(pcl,x=-1..1);\


                                        1
--------------------------------------------------------------------------------
> pcl1 := int(pcl,x=u..v);

                                  arcsin(v)   arcsin(u)
                          pcl1 := --------- - ---------
                                      Pi          Pi
--------------------------------------------------------------------------------
> pcl2 := limit(pcl1,u=-1);

                                      2 arcsin(v) + Pi
                          pcl2 := 1/2 ----------------
                                             Pi
--------------------------------------------------------------------------------
> limit(pcl2,v=1);

                                        1
--------------------------------------------------------------------------------
