Dear Student
To see which functions are odd and which are even from graph there is same method for all whether they are rational functions or inverse trigonometrical functions. Graphs which are symmetric about the origin and the value of function remains unchanged when graph is rotated by 180 degree about origin are called odd functions whereas graphs which are symmetrical about y-axis are called even function. The graphs which are not satisfying any of the above conditions are neither even nor odd.
Among inverse trigonometric functions arcsin, arctan, arccosecant are odd functions while arccos, arccot, arcsecant are neither odd nor even functions. There is no even inverse trigonometric function.
Regards