how would i state the domain for this:
f(x) = - 2 cot 3x

- anonymous

how would i state the domain for this:
f(x) = - 2 cot 3x

- chestercat

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- anonymous

is that a 3x or cot^3 (x)

- anonymous

3x

- rock_mit182

let's say U = 3x.
Y = -2 cot (U).
Do you remember the identity of cot (U) =

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## More answers

- rock_mit182

?

- rock_mit182

- anonymous

no i dont know what that means

- rock_mit182

cot (U) = \[\frac{ \cos (u) }{ \sin(u) }\]

- anonymous

oh yeah i knew that

- anonymous

but what do i do with that

- rock_mit182

;) now, to find out your domain we have to avoid \[\frac{ 0 }{ 0 }\]

- rock_mit182

cause \[\frac{ 0 }{ 0 }\] doesn't make sense in math is jut not allowed

- anonymous

no shh i really knew that i just didnt know what you were asking and i still know that what i dont understan is how to state it

- rock_mit182

so we need to avoid those values tha makes: \[\frac{ \cos u }{ \sin u }\]

- anonymous

he gave you the identity, now he's trying to avoid sin U where sin U = 0 so that the function is undefined

- rock_mit182

0 over o

- anonymous

like i know it cant equal pi/3 or any other vertical asymtope but i dont know how to write that

- anonymous

i know the values it cant equal though i need to know how to write it

- rock_mit182

well it is getting harder to explain LOL

- rock_mit182

Do you have how to graph that function ?

- anonymous

how bout you just tell me the answer lol because i already know everything i dont need explaining i need to know how its supposed to be writen

- anonymous

yes i do

- anonymous

ive already graphed it

- anonymous

do you understand what im asking like you know how you write it in parenthesis i need to know how im supposed to put the values in there

- rock_mit182

of course i do , but what i cannot do, here, is just give ramdom answers

- anonymous

its not random but oh well

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