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    Umpalumpa's Avatar
    Umpalumpa Posts: 6, Reputation: 1
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    #1

    Jun 24, 2008, 10:00 AM
    Height problems for Trigonometry.
    Having quiet a hard time with this trig stuff. REALLY CONFUSING!
    Here's a question I've been trying to figure out for an hour:
    John and Sally want to emasure the height of a chimney. They locate two points on the ground, A and B, that are 120 m apart in the same plane as the chimney. The angles of elevation to the top of the chimney are 21(degrees) from the point A and 33(degrees) from point B. I have to find the height of the chimney - to the nearest metre
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #2

    Jun 24, 2008, 10:57 AM
    Again, did you draw a picture?

    Look at the diagram. You need y given the distance between A and B is 120

    The distance from A to the chimney is 120+x.

    The distance from B to the chimney is x.

    Using the tangent law, we have

    And

    Solve the two equations.
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    Greek2Me's Avatar
    Greek2Me Posts: 9, Reputation: 1
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    #3

    Oct 15, 2009, 09:23 AM

    Check out these articles for a simple tool and tutorial that will make trig simple enough for ANYBODY to do!

    How to Pass That Trigonometry Exam (Without Losing Your MIND!) Part I - Unknown Sides | eHow.com

    How to Pass That Trigonometry Exam (Without Losing Your MIND!) Part II - Unknown Angles | eHow.com
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