Question

Can someone explain why the domain of arcsec(x) is (-infinity,1]union[1,+infinity)?

Answer 1

What is arcsec(x) even asking?

sin(x) is asking give an angle and it will give the y coordinate that corresponds to that angle

Answer 2

Do you know the domain and range of \(\sec x\) ? \(\sec^{-1}x\) is the inverse of \(\sec x\), so their domains/ranges/ are reversed.

Answer 3

Also, "Primus sucks!"

Answer 4

no I will think about it and Primus sucks forever!

Answer 5

Here's \(\sec x\):