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Math Help - Degrees, Minutes, Seconds form (DMS)

  1. #1
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    Degrees, Minutes, Seconds form (DMS)

    I'm learning about degrees and radians and this came up in my homework.

    Convert:

    Example: 54(degrees)45(minutes)

    to decimal degree form.

    I know (after using the DMS function on my calculator) that the answer is 54.75

    How do I do this without my calculator?

    How do I convert DMS back and forth?
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  2. #2
    Super Member bigwave's Avatar
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    Quote Originally Posted by makinsushi View Post
    I'm learning about degrees and radians and this came up in my homework.

    Convert:

    Example: 54(degrees)45(minutes)

    to decimal degree form.

    I know (after using the DMS function on my calculator) that the answer is 54.75

    How do I do this without my calculator?

    How do I convert DMS back and forth?
    use the DD conversion (to get the decimal degrees)
    be sure that mode set to approximate
    with TI-89 anyway
    Last edited by bigwave; December 9th 2009 at 05:43 PM. Reason: spelling
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  3. #3
    Senior Member
    Joined
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    The OP said to do it without a calculator.

    We have 54 and 45 minutes.

    We have to convert into decimal.

    How many minutes in a degree? 60.

    So  \frac {45}{60}

     = 3/4

     = 0.75

    So that's how you get 54.75
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