Ask Experts Questions for FREE Help !
Ask
    Umpalumpa's Avatar
    Umpalumpa Posts: 6, Reputation: 1
    New Member
    		  
    #1

    Jun 24, 2008, 09:57 AM
    Trigonometry- height & length apart
    I really don't get this:S
    A video camera is mounted at the top of a 120m building. When the camera tilts down 36(degrees) with the horizontal, it views the bottom of another building. If it tilts up at 47 (degrees) to the horizontal, it can view the top of the same building.
    a) How far apart are the two buildings?
    b) how tall is the building that the camera sees?

    HELP!:-|:confused: :(
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
    Ultra Member
    		  
    #2

    Jun 24, 2008, 10:47 AM
    Draw a picture. That always helps. Use the law of tangents to find x and y.

    Sorry, my diagram is not too scale but it gives the idea.
    Attached Images
     
    brandizzle's Avatar
    brandizzle Posts: 8, Reputation: 1
    New Member
    		  
    #3

    Jun 24, 2008, 12:02 PM
    your formulas would be tan36=x/120 for how far apart the buildings are. Then plug in x for the formula for the height of second building--- tan47=x/y.
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
    Uber Member
    		  
    #4

    Jun 25, 2008, 04:14 AM
    Hum... brandizzle? You messed up woth your formulas. The formula is tan36=120/x instead of tan36=x/120 and tan47=y/x instead of tan47=x/y...

    And you should then add y to 120 to get the height of the building, not just stopping at tan47=y/x.
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Installing Closet Flange on Schedule 30 3" pipe - floor height issue [ 1 Answers ]

Hi All, I'm finishing a basement bath and have installed the floor (ceramic tile). I have a schedule 30 3" water closet waste pipe rough in. I cut the pipe flush with the tile floor and removed the plastic wrap (so I can install a flange on the outside of the pipe). I went to Lowes and...

Trigonometry [ 1 Answers ]

Could you please help me with this trigonometric problem? A triangle has two sides of length of 30cm and an angle of 50deg. Unfortunately, the position of the angle is not known. Sketch the 2 possible triangles and use them to work out the 2 possible lengths of the third side of the triangle....

Is there a height limit to block walls used as fencing ? [ 1 Answers ]

I currently have a block wall that is approx. 19' tall. It has a retaining wall that is 15' out and 3' high that slopes up to approx' height of 6' against the main wall leaving 13' of exsposed wall above the retainer. There are houses that share the other side of the block wall however the lots are...

View more questions Search