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anonymous

  • one year ago

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

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  1. anonymous
    • one year ago
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    is that a 3x or cot^3 (x)

  2. anonymous
    • one year ago
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    3x

  3. rock_mit182
    • one year ago
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    let's say U = 3x. Y = -2 cot (U). Do you remember the identity of cot (U) =

  4. rock_mit182
    • one year ago
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    ?

  5. rock_mit182
    • one year ago
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    @kirarittgers

  6. anonymous
    • one year ago
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    no i dont know what that means

  7. rock_mit182
    • one year ago
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    cot (U) = \[\frac{ \cos (u) }{ \sin(u) }\]

  8. anonymous
    • one year ago
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    oh yeah i knew that

  9. anonymous
    • one year ago
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    but what do i do with that

  10. rock_mit182
    • one year ago
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    ;) now, to find out your domain we have to avoid \[\frac{ 0 }{ 0 }\]

  11. rock_mit182
    • one year ago
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    cause \[\frac{ 0 }{ 0 }\] doesn't make sense in math is jut not allowed

  12. anonymous
    • one year ago
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    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

  13. rock_mit182
    • one year ago
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    so we need to avoid those values tha makes: \[\frac{ \cos u }{ \sin u }\]

  14. anonymous
    • one year ago
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    he gave you the identity, now he's trying to avoid sin U where sin U = 0 so that the function is undefined

  15. rock_mit182
    • one year ago
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    0 over o

  16. anonymous
    • one year ago
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    like i know it cant equal pi/3 or any other vertical asymtope but i dont know how to write that

  17. anonymous
    • one year ago
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    i know the values it cant equal though i need to know how to write it

  18. rock_mit182
    • one year ago
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    well it is getting harder to explain LOL

  19. rock_mit182
    • one year ago
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    Do you have how to graph that function ?

  20. anonymous
    • one year ago
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    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

  21. anonymous
    • one year ago
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    yes i do

  22. anonymous
    • one year ago
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    ive already graphed it

  23. anonymous
    • one year ago
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    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

  24. rock_mit182
    • one year ago
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    of course i do , but what i cannot do, here, is just give ramdom answers

  25. anonymous
    • one year ago
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    its not random but oh well

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