Results 1 to 4 of 4

Math Help - Trig LIMITS help needed!!

  1. #1
    Senior Member
    Joined
    Sep 2009
    Posts
    299

    Exclamation Trig LIMITS help needed!!

    any one know how to do the question in the picture, answer back, becaus ei have no idea how to do it..
    Attached Thumbnails Attached Thumbnails Trig LIMITS help needed!!-math.jpg  
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Math Engineering Student
    Krizalid's Avatar
    Joined
    Mar 2007
    From
    Santiago, Chile
    Posts
    3,654
    Thanks
    12
    you need to factorise which is inside of the arctan function.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Senior Member
    Joined
    Sep 2009
    Posts
    299
    i dont get what you are saying, but when i simplify, then i get
    lim x -> 2 arctan(x+2/5x)
    then i put in 2, and get 4/10, then i do arctan of that and get 21.804
    but this is the wrong answer, how do i properly do this..???
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Banned
    Joined
    Oct 2009
    Posts
    4,261
    Thanks
    2
    Quote Originally Posted by Sneaky View Post
    i dont get what you are saying, but when i simplify, then i get
    lim x -> 2 arctan(x+2/5x)
    then i put in 2, and get 4/10, then i do arctan of that and get 21.804
    but this is the wrong answer, how do i properly do this..???

    Then they're wrong and you're right: it is Arctan(2/5). Perhaps the answer is given in radians instead of degrees? Then it'd be 0.3805 rad.

    Tonio
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Help needed in Limits
    Posted in the Pre-Calculus Forum
    Replies: 8
    Last Post: April 7th 2010, 04:43 AM
  2. Help Needed with Advanced Limits
    Posted in the Calculus Forum
    Replies: 5
    Last Post: October 1st 2009, 01:16 PM
  3. Help Needed with Advanced Limits # 2
    Posted in the Calculus Forum
    Replies: 2
    Last Post: September 30th 2009, 12:36 PM
  4. Help Needed with Advanced Limits # 3
    Posted in the Calculus Forum
    Replies: 2
    Last Post: September 30th 2009, 12:14 PM
  5. Limits.. help needed!
    Posted in the Calculus Forum
    Replies: 5
    Last Post: October 22nd 2008, 08:49 PM

Search Tags


/mathhelpforum @mathhelpforum