Results 1 to 2 of 2

Math Help - Polar coordinates?

  1. #1
    Senior Member
    Dec 2010

    Polar coordinates?

    Find the distance between these two polar points
    P1(1.3,-47 degrees) and P2(-3.6,-62 degrees)

    I know the formula to find distance is

    square root R1^2+R2^2-2(R1R2)cos(angle 2- angle1)

    But when I plug in the numbers in my calculator I get an unreal answer but checking the answer on the back of my math book I know that is incorrect.

    Can anyone show me how to do this problem?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Sep 2008


    I get 2.74578
    Is that the answer that you think it should be?

    When you type it in:

    is your -3.6 in () when you square it?

    (1.3)^2 + (-3.6)^2 -2(1.3)(-3.6)Cos(-47 - -62) all under the radical sign.

    also is your calculator in the correct mode if you can change it?
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 10
    Last Post: September 24th 2010, 05:33 AM
  2. Polar Coordinates
    Posted in the Calculus Forum
    Replies: 2
    Last Post: March 22nd 2010, 08:59 PM
  3. Replies: 6
    Last Post: February 4th 2009, 01:12 AM
  4. Polar coordinates
    Posted in the Calculus Forum
    Replies: 1
    Last Post: January 27th 2008, 03:16 AM
  5. Polar Coordinates and Polar Graphs
    Posted in the Pre-Calculus Forum
    Replies: 4
    Last Post: October 2nd 2007, 05:44 PM

Search Tags

/mathhelpforum @mathhelpforum