Can someone please help me out. This is what I have to do:

- List the key features of the graphs above. Include domain, range, period, and the existence of asymptotes.

for a) y = arccosx

b) y = arctanx.

__Work I've done: __
A) Arccos x

Domain: -1 ≤

*x* ≤ 1

Range: 0 ≤ arccos

*x* ≤ π

B) Arctan x

Domain: xER

Range: -π/2 ≤ arctan

*x* ≤ π/2

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What I need help with:

I don't know how to do the period or the existance of asymptotes ... can you help me with one of them and show how you did it so I can do it for the other graph?

thanks