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    Memecakes's Avatar
    Memecakes Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Feb 22, 2008, 01:47 PM
    Trigonometry
    I need help answering this trigonometry word problem:

    The angle of elevation from a buoy to the top of a bridge is 19 degrees. The bridge is 150 feet high. How far from the foot of the bridge's pillar is the buoy?

    I used tangent to try to solve it and got 51.6, but my answer book gives me 435.67. Please tell me what steps I am missing
    eeseely's Avatar
    eeseely Posts: 100, Reputation: 3
    Junior Member
    		  
    #2

    Feb 22, 2008, 02:06 PM
    Try it another way:

    The sine of 19 degrees is 0.325568154 and
    height of the bridge is 150 feet.

    Divide 150 by the sine of 19 degrees
    will give you the correct answer = 460.733023
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
    Ultra Member
    		  
    #3

    Feb 22, 2008, 03:55 PM
    Just use the law of tangents. The correct answer is 435.63
    eeseely's Avatar
    eeseely Posts: 100, Reputation: 3
    Junior Member
    		  
    #4

    Feb 23, 2008, 06:42 AM
    I did make a mistake and stand corrected. I'm an older person.
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