Jake Elwood Posted April 26, 2012 Share Posted April 26, 2012 I need to know the angle pitch of my roof and my scientific calculator has gone on the blink seeing as I have not used it in 20 years. The horizontal line is 2970mm and the vertical 1170mm. Thanks in advance who can give me the answer. Link to comment Share on other sites More sharing options...
HeadingNorth Posted April 26, 2012 Share Posted April 26, 2012 Arctan (1170/2970) = 21.5 degrees, just about. (The calculator says 21.50143432404.... but 21.5 is correct to within one five-hundredth of a degree!) Link to comment Share on other sites More sharing options...
Guest sibon Posted April 26, 2012 Share Posted April 26, 2012 I did it by binomial expansion and laplace transpose. You should have done inverse tan instead. Then you would have got the correct answer, like HN. Link to comment Share on other sites More sharing options...
HeadingNorth Posted April 26, 2012 Share Posted April 26, 2012 You should have done inverse tan instead. Then you would have got the correct answer, like HN. I have no idea how that answer is applicable to the question of roofing, though; he might actually want the angle of the other corner but that's easy to work out. I just did the raw calculation. Link to comment Share on other sites More sharing options...
Happ Hazzard Posted April 26, 2012 Share Posted April 26, 2012 Just get your protactor out and stand far enough away from your house so you can hold it up and measure the angle. Simple! Link to comment Share on other sites More sharing options...
gnvqsos Posted April 26, 2012 Share Posted April 26, 2012 I did it by binomial expansion and laplace transpose. How can a lap-dance help with SOHCAHTOA? Link to comment Share on other sites More sharing options...
gnvqsos Posted April 26, 2012 Share Posted April 26, 2012 It is 43 degrees. It is a domestic roof,not the flank of the Notre Dame:hihi: Link to comment Share on other sites More sharing options...
gnvqsos Posted April 26, 2012 Share Posted April 26, 2012 Some Old Hens ........... Cackle And Hoot ................ To Obtain Acorns:roll: Soft Or Hard,Come And Hold,Take Old Abstainers Link to comment Share on other sites More sharing options...
Jim Hardie Posted April 26, 2012 Share Posted April 26, 2012 I need to know the angle pitch of my roof and my scientific calculator has gone on the blink seeing as I have not used it in 20 years. The horizontal line is 2970mm and the vertical 1170mm. Thanks in advance who can give me the answer. Are you sure of these dimensions? 21.5 degrees is a very shallow pitch. What sort of roof covering does it have? Link to comment Share on other sites More sharing options...
HeadingNorth Posted April 26, 2012 Share Posted April 26, 2012 Are you sure of these dimensions? 21.5 degrees is a very shallow pitch. What sort of roof covering does it have? Here's a question. By "horizontal line" does he mean from the edge to the top, or the entire length of the roof from one edge to the other? If the latter, my calculation will be wrong. I know less than nothing about roofing; my only contribution is to plug the numbers in and report the result. Link to comment Share on other sites More sharing options...
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