anonymous
  • anonymous
A flagpole 4 m tall stands on a sloping roof. A support wire 5 m long joins the top of the pole to a point on the roof 6 m up from the bottom of the pole. At what angle is the roof inclined to the horizontal?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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ganeshie8
  • ganeshie8
draw it out
anonymous
  • anonymous
i've tried but i really have no idea what it's saying
ganeshie8
  • ganeshie8
It is a bit ambiguous but lets try and make sense of it whatever we can, start by drawing a roof

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More answers

ganeshie8
  • ganeshie8
|dw:1436236697787:dw|
ganeshie8
  • ganeshie8
|dw:1436236736659:dw|
ganeshie8
  • ganeshie8
|dw:1436236818328:dw|
ganeshie8
  • ganeshie8
does that make sense or do you think we are off
Miracrown
  • Miracrown
|dw:1436237277123:dw|
Miracrown
  • Miracrown
I am a bit confused by the problem. It says there is a 4m pole on top of a roof. Then it says a wire joins the top of a support wire 5m long joins the top of the pole to a point on the roof 6m up from the bottom of the pole. That is where I get confused...
ganeshie8
  • ganeshie8
poorly phrased question haha
Miracrown
  • Miracrown
Sure is aha
anonymous
  • anonymous
sorry my internet cut out let me work thorough what y'all just posted
anonymous
  • anonymous
hmm ok so using @ganeshie8 drawing |dw:1436237283112:dw| (sorry about my terrible digital art :P) would i be solving for that angle?
Miracrown
  • Miracrown
I don't think that's how I saw it ...
Miracrown
  • Miracrown
|dw:1436238040201:dw|
ganeshie8
  • ganeshie8
nice home
Miracrown
  • Miracrown
ROFL thanks!!!
Miracrown
  • Miracrown
All in all its still not making any sense =/
ganeshie8
  • ganeshie8
|dw:1436238176817:dw|
ganeshie8
  • ganeshie8
They want that angle, I think
Miracrown
  • Miracrown
The way the problem is set up, it looks like the creator was expecting you to use Law of Cosines
anonymous
  • anonymous
ok those drawings make sense..but what do i plug into the law of cosines to find the roof angle?
Miracrown
  • Miracrown
|dw:1436239234310:dw|
Miracrown
  • Miracrown
So this is what I'm seeing here: a point on the roof 6m "up" from the bottom of the pole can mean two things.. it can mean the triangle you showed me with the angle between 4 and 6 |dw:1436239558073:dw| or it can be interpreted as the picture I just drawn - the point is 6m up vertically Which makes the problem harder to solve, of course, but easy doesn't always mean correct. The triangle you presented to me will probably be what most students are going to try. in the case of the first triangle remember that the law of Cosines is: c^2 = a^2 + b^2 - 2ab cos C so in the first triangle, which is what many people will try the side opposite to the angle you are trying to solve for is c and the other two sides are a and b using the law of Cosines, you should be able to solve for the angle Θ, which is "C"
anonymous
  • anonymous
ok thank you! i have to go right now but i'll work it out. thanks so much

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