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Math Help - question about "mils"

  1. #1
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    question about "mils"

    I have a difficulties calculating "mils". The question says that a mil is the measurement of an arc that is equal to 1/6400 of a circle.

    Now, it's asking me to calculate the measurement in radians of an angle that measures 1 mil.

    To my understanding, a circle is equal to  2{\pi} so I calculated:  \frac{2\pi}{6400} which game 0.000981747703...

    But it says that I need to round the answer to 2 decimals, which wouldn't make much sense. Am I calculating this correctly? Thank you
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  2. #2
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    Hello andres
    Quote Originally Posted by andres View Post
    I have a difficulties calculating "mils". The question says that a mil is the measurement of an arc that is equal to 1/6400 of a circle.

    Now, it's asking me to calculate the measurement in radians of an angle that measures 1 mil.

    To my understanding, a circle is equal to  2{\pi} so I calculated:  \frac{2\pi}{6400} which game 0.000981747703...

    But it says that I need to round the answer to 2 decimals, which wouldn't make much sense. Am I calculating this correctly? Thank you
    Your calculation is OK, and to 2 d.p. the value is 0.00 radians - which doesn't sound particularly useful. Perhaps the question means to 2 s.f., in which case it's 0.00098.

    Grandad
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    Quote Originally Posted by andres View Post
    I have a difficulties calculating "mils". The question says that a mil is the measurement of an arc that is equal to 1/6400 of a circle.

    Now, it's asking me to calculate the measurement in radians of an angle that measures 1 mil.

    To my understanding, a circle is equal to  2{\pi} so I calculated:  \frac{2\pi}{6400} which game 0.000981747703...

    But it says that I need to round the answer to 2 decimals, which wouldn't make much sense. Am I calculating this correctly? Thank you
    Hi andres,

    A radian approximately equals 57.2958 degrees

    A milliradian (mil) measures 1/1000 of 57.2958 degrees or .06 degrees to 2 decimal places. If you want, you can convert that to radians.
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    Quote Originally Posted by Grandad View Post
    Hello andresYour calculation is OK, and to 2 d.p. the value is 0.00 radians - which doesn't sound particularly useful. Perhaps the question means to 2 s.f., in which case it's 0.00098.

    Grandad
    Thank you so much, I will answer 0.00 as it says that I need to round the answer to 2 decimals, I just wanted to make sure that I was doing it correctly! Thanks again
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    Quote Originally Posted by masters View Post
    Hi andres,

    A radian approximately equals 57.2958 degrees

    A milliradian (mil) measures 1/1000 of 57.2958 degrees or .06 degrees to 2 decimal places. If you want, you can convert that to radians.

    Hi, the book speficies that I need to base 1 Mil as 1/6400 of a circle. Thanks!
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  6. #6
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    Quote Originally Posted by andres View Post
    I have a difficulties calculating "mils". The question says that a mil is the measurement of an arc that is equal to 1/6400 of a circle.

    Now, it's asking me to calculate the measurement in radians of an angle that measures 1 mil.

    To my understanding, a circle is equal to  2{\pi} so I calculated:  \frac{2\pi}{6400} which game 0.000981747703...

    But it says that I need to round the answer to 2 decimals, which wouldn't make much sense. Am I calculating this correctly? Thank you
    Quote Originally Posted by andres View Post
    Hi, the book speficies that I need to base 1 Mil as 1/6400 of a circle. Thanks!
    Yes, but you asked about the angle that forms the arc that is 1/6400 of the circle. Arc length and arc degree are two different things
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