Results 1 to 7 of 7

Math Help - How do you convert an angle to a fraction?

  1. #1
    Newbie
    Joined
    Aug 2009
    Posts
    15

    How do you convert an angle to a fraction?

    Okay, the question says to find the value of "tan" - I did and it was 40 degrees. But the options are all in fractions... none of which convert to 40. I am stumped... I'm thinking there must be some sort of trick to this that I'm not getting... please help me.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,875
    Thanks
    656
    Quote Originally Posted by ineedhelp87 View Post
    Okay, the question says to find the value of "tan" - I did and it was 40 degrees. But the options are all in fractions... none of which convert to 40. I am stumped... I'm thinking there must be some sort of trick to this that I'm not getting... please help me.
    then you made an error. tangent is a ratio ... not an angle.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Aug 2009
    Posts
    15
    Thank you... I just realized my mistake. I feel a bit silly. But I still need help. So, tan is the opposite side over the adjecent side, which in this triangle - http://i32.tinypic.com/11i21as.jpg - is 10/15. How can I convert this?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Newbie
    Joined
    Aug 2009
    Posts
    15
    Options are square root of 11 / 5, square root of 11 / 6, 5/6, and 6/5.
    Follow Math Help Forum on Facebook and Google+

  5. #5
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,875
    Thanks
    656
    Quote Originally Posted by ineedhelp87 View Post
    Thank you... I just realized my mistake. I feel a bit silly. But I still need help. So, tan is the opposite side over the adjecent side, which in this triangle - http://i32.tinypic.com/11i21as.jpg - is 10/15. How can I convert this?
    find the opposite side using Pythagoras.
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Newbie
    Joined
    Aug 2009
    Posts
    15
    I did and it was 10...
    Follow Math Help Forum on Facebook and Google+

  7. #7
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,875
    Thanks
    656
    Quote Originally Posted by ineedhelp87 View Post
    I did and it was 10...
    the opposite side is not 10 ...

    \sqrt{18^2 - 15^2} = \sqrt{99} = 3\sqrt{11}

    \tan{\theta} = \frac{3\sqrt{11}}{15} = \frac{\sqrt{11}}{5}<br />
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Convert decimal to fraction of an inch
    Posted in the Geometry Forum
    Replies: 3
    Last Post: May 11th 2011, 05:21 PM
  2. convert to fraction
    Posted in the Algebra Forum
    Replies: 1
    Last Post: October 29th 2008, 03:42 PM
  3. how to convert a decimal to a fraction
    Posted in the Math Topics Forum
    Replies: 2
    Last Post: June 9th 2008, 04:14 AM
  4. how to convert decimal to fraction on calculator?
    Posted in the Trigonometry Forum
    Replies: 5
    Last Post: February 3rd 2008, 05:01 PM
  5. [SOLVED] Convert to fraction..
    Posted in the Algebra Forum
    Replies: 1
    Last Post: November 28th 2007, 09:00 PM

Search Tags


/mathhelpforum @mathhelpforum