[Tex/LaTex] Trigonometric notation with Initial capital Letter and Italic


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?

Best Answer

I would highly recommend you not do this, but you can use \DeclareMathOperator to change how the operators are typeset:


enter image description here

If you want the operator name in italics you can instead use:


enter image description here

Again, I would advice you to not do this. It is not consistent with the normal conventions.


  • The \let were necessary as we are redefining existing macros, so \let the existing definition to \relax eliminates the error message.




$\cos^2 \theta + \sin^2 \theta = 1$