Results 1 to 3 of 3

Math Help - Could someone please walk me through this? I would really appreciate it. Trigonometry

  1. #1
    Newbie
    Joined
    Aug 2013
    From
    Edmonton
    Posts
    9

    Could someone please walk me through this? I would really appreciate it. Trigonometry

    The Aztec people of pre-Columbian Mexico used the Aztec Calendar. it consisted of a 365-day calendar cycle and a 260-day ritual cycle. In the stone carving of the calendar, the second ring from the centre showed the days of the month, numbered from one to 20. Suppose the calendar was placed on a Cartesian plane, as shown below.

    Could someone please walk me through this? I would really appreciate it. Trigonometry-photo571.jpg

    a.) The blue angle marks the passing of 12 days. Determind the measure of the angle.

    b.) How many days would have passed if the angle had been drawn in quadrant II, using the same reference angle as in part a?

    c.) Keeping the same reference angle, how many days would have been passed if the angle had been drawn in quadrant IV?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member

    Joined
    May 2006
    From
    Lexington, MA (USA)
    Posts
    11,806
    Thanks
    696

    Re: Could someone please walk me through this? I would really appreciate it. Trigonom

    Hello, smyatsallie!

    The Aztec people of pre-Columbian Mexico used the Aztec Calendar.
    It consisted of a 365-day calendar cycle and a 260-day ritual cycle.
    In the stone carving of the calendar, the second ring from the centre showed the days of the month,
    numbered from one to 20. Suppose the calendar was placed on a Cartesian plane, as shown below.

    Click image for larger version. 

Name:	photo571.JPG 
Views:	5 
Size:	86.0 KB 
ID:	29537

    (a) The blue angle marks the passing of 12 days. .Determine the measure of the angle.

    (b) How many days would have passed if the angle had been drawn in quadrant II,
    . . using the same reference angle as in part (a)?

    (c) Keeping the same reference angle, how many days would have been passed
    . . if the angle had been drawn in quadrant IV?

    This diagram should help you . . .

    Code:
                  * * *
              *     |     *
            *       |       *
           *        |        *
                5   |   5
          *         |         *
          * - - - - + - - - - *
          *       * |         *
             3  *   |   5
           *  *   2 |        *
            *       |       *
              *     |     *
                  * * *
    Follow Math Help Forum on Facebook and Google+

  3. #3
    MHF Contributor

    Joined
    Apr 2005
    Posts
    15,977
    Thanks
    1643

    Re: Could someone please walk me through this? I would really appreciate it. Trigonom

    I may not be understanding this. You say that the inner circle is a month, 20 days long, but the blue lines extend to the entire width of the stone. If they are intended to show 12 out of 20 days, that is 12/20= 3/5 of a circle. How many degrees is 3/5 of a full circle?

    b) doesn't make a lot of sense to me. The angle drawn is not in one quadrant to begin with so it cannot be drawn in quadrant II. Is it possible that the question asked "if the second ray of the angle were in the second quadrant? Since the problem says "using the same reference angle as in part a", what is that reference angle?

    c) same question for (c)- if the second ray is in quadrant IV, what reference angle should you use and what is the total angle.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. can someone walk me through this
    Posted in the Algebra Forum
    Replies: 1
    Last Post: June 9th 2012, 02:12 PM
  2. walk
    Posted in the Discrete Math Forum
    Replies: 2
    Last Post: February 15th 2011, 07:12 AM
  3. Taking a walk
    Posted in the Math Puzzles Forum
    Replies: 4
    Last Post: April 16th 2010, 09:58 AM
  4. random walk
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: November 16th 2009, 01:50 PM
  5. Walk me through this please
    Posted in the Geometry Forum
    Replies: 3
    Last Post: November 8th 2009, 01:09 AM

Search Tags


/mathhelpforum @mathhelpforum