Re: python math problem

Discussion in 'Python' started by Bob Brusa, Feb 15, 2013.

  1. Bob Brusa

    Bob Brusa Guest

    Am 15.02.2013 20:39, schrieb Kene Meniru:
    > I am trying to calculate the coordinates at the end of a line. The length
    > and angle of the line are given and I am using the following formula:
    >
    > x = (math.sin(math.radians(angle)) * length)
    > y = (math.cos(math.radians(angle)) * length)
    >
    > The following are sample answers in the format (x, y) to the given
    > length/angle values of the line:
    >
    > 120/0 = (0.0, 25.0)
    > 120/89 = (24.9961923789, 0.436310160932)
    > 120/90 = (25.0, 1.53075794228e-15)
    > 120/91 = (24.9961923789, -0.436310160932)
    >
    > Why am I getting a string number instead of the expected answer for 120/90
    > which should be (25.0, 0.0). This happens at all multiples of 90 (i.e. 180
    > and 270)
    >

    Kene,
    are you sure your length is 120? It seems to be 25. I did these
    calculations with length = 25 and then your numbers make perfect sense.
    Bob
     
    Bob Brusa, Feb 15, 2013
    #1
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