# Easy trig question

GreenPrint
I feel kind of dumb asking this (it's been a while sense I took precalc) but I always thought that if I had something like

that if I added any whole integer multiple of 2pi to the answer I would get equivalent answers. Is this correct? Like

you get different angles but they can still act as correct answers to
arctan(stuff)?

Staff Emeritus
Homework Helper
Gold Member
I feel kind of dumb asking this (it's been a while sense I took precalc) but I always thought that if I had something like

that if I added any whole integer multiple of 2pi to the answer I would get equivalent answers. Is this correct? Like

you get different angles but they can still act as correct answers to
arctan(stuff)?
tan(x) is periodic with a period of π .

In other words, if tan('answer') = stuff, then it's also true that tan('another answer') = stuff .

GreenPrint
ok well in this case i can add multiples of two pi's as well than?

Staff Emeritus