It depends who's workin' on it.
Some books denote that may cause confusion, but it's a notation addapted.
I know this isn't true:
Yet, does the same rules apply to inverse functions regarding the reciprocals? For example:
Still my main question remains; Is this equality true? Can I apply the same known trigonometric reciprocals with the inverse trig functions?
Ah ha! That's what I thought. I searched through the book but it didn't answer this question. I'm assuming that when you read the chapter you are supposed see that the domains of these functions are limited; and because of this, you cannot apply the same rules to them as you do with regular trig functions.