Results 1 to 3 of 3

Math Help - Circle Problem

  1. #1
    Member
    Joined
    Apr 2009
    Posts
    87

    Circle Problem

    A circle of radius 1m .
    Ctr is located at x=0,y=0.
    a point on circle at y=-1 .
    the circle rotates thru an angle of 50 deg.
    what is the x,y coordinate of the point?
    How would you go about solving this?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Prove It's Avatar
    Joined
    Aug 2008
    Posts
    11,407
    Thanks
    1294
    \displaystyle x = r\cos{\theta} and \displaystyle y = r\sin{\theta}.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,605
    Thanks
    1574
    Awards
    1
    Quote Originally Posted by heatly View Post
    A circle of radius 1m .
    Ctr is located at x=0,y=0.
    a point on circle at y=-1 .
    the circle rotates thru an angle of 50 deg.
    what is the x,y coordinate of the point?
    How would you go about solving this?
    Every point on the unit circle looks like \left( {\cos (t),\sin (t)} \right).

    The point (0,-1) happens it t=-90^o.

    So rotate it 50^o counter-clockwise.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. circle problem
    Posted in the Geometry Forum
    Replies: 1
    Last Post: April 25th 2010, 12:01 PM
  2. Circle Problem
    Posted in the Geometry Forum
    Replies: 7
    Last Post: March 17th 2010, 05:35 PM
  3. circle problem please help
    Posted in the Geometry Forum
    Replies: 1
    Last Post: September 30th 2009, 09:59 AM
  4. Circle Problem
    Posted in the Geometry Forum
    Replies: 5
    Last Post: May 12th 2009, 10:27 AM
  5. Help with a circle problem
    Posted in the Geometry Forum
    Replies: 1
    Last Post: March 20th 2007, 02:48 PM

Search Tags


/mathhelpforum @mathhelpforum