How can we make First letter Capital while using trigonometric functions. eg: \cos (60^\circ) gives simple cos (all in small). What is needed is 'Cos' (with initial capital). For italics in mactex i used \it but it didn't italicized 'cos' only the number '60'. So how to do that?
I would highly recommend you not do this, but you can use
If you want the operator name in italics you can instead use:
Again, I would advice you to not do this. It is not consistent with the normal conventions.