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Math Help - Working with angles

  1. #1
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    Working with angles

    1) It is 4.7km from Lighthouse A to Port B. The bearing of the port from the lighthouse is N73 degrees E. A ship has sailed due west from the port and its bearing from the lighthouse is N31 degrees E. How far has the ship sailed from the port? Round to the nearest tenth.

    2) Points A and B are on opposite sides of a lake. Point C is 97.4 meters from A. The measure of angle BAC is 76 degrees 40', and the measure of angle ACB is determined to be 34 degrees 30'. Find the distance between points A and B (to the nearest meter)

    Need help in explanation... be as detailed as possible. Thanks
    Last edited by Ackbeet; October 17th 2011 at 05:00 PM.
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  2. #2
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    Re: Working with angles

    Quote Originally Posted by user001 View Post
    1) It is 4.7km from Lighthouse A to Port B. The bearing of the port from the lighthouse is N73 degrees E. A ship has sailed due west from the port and its bearing from the lighthouse is N31 degrees E. How far has the ship sailed from the port? Round to the nearest tenth.

    2) Points A and B are on opposite sides of a lake. Point C is 97.4 meters from A. The measure of angle BAC is 76 degrees 40', and the measure of angle ACB is determined to be 34 degrees 30'. Find the distance between points A and B (to the nearest meter)

    Need help in explanation... be as detailed as possible. Thanks
    What have you done to complete any one of these problems?
    Last edited by mr fantastic; October 18th 2011 at 03:42 AM.
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  3. #3
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    Re: Working with angles

    Quote Originally Posted by skeeter View Post
    What have you done to complete any one of these problems?
    For most I've set up a triangle and labeled each side/angle with the given information, then use the Law of Sine to find the missing parts... but my answers are always incorrect according to "mymathlab".
    Last edited by Ackbeet; October 17th 2011 at 05:00 PM.
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  4. #4
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    Re: Working with angles

    Quote Originally Posted by user001 View Post
    For most I've set up a triangle and labeled each side/angle with the given information, then use the Law of Sine to find the missing parts... but my answers are always incorrect according to "mymathlab".
    can't tell what you've done wrong if you don't show anything ...
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