Computer Forums Finding the correct angle?

 04-26-2008, 09:35 PM #1 Fully Optimized   Join Date: Nov 2006 Posts: 3,629 Finding the correct angle? Rep to whoever can solve this and help me out. Edit: I've got the answer now but I guess I'll leave it unsolved for now to see if anyone can solve it here. Point A 1802 Feet Point B 2170 Feet Distance 5.21 Miles I need to aim my antenna from point A at the top of point B at 2170 Feet. What specific angle would this be? The antenna is currently pointed horizontal with the ground. Assuming the ground is 180 degrees I'm currently at 90 degrees what degree lines up with 2170 Feet? __________________ __________________
 04-26-2008, 09:51 PM #2 Fully Optimized     Join Date: Aug 2007 Posts: 2,186 Re: Finding the correct angle? /Brain explodes __________________ __________________ dude_56013: "Find something you love...and never work a day in your life" David Lindon: "Faggot"
 04-26-2008, 10:14 PM #3 Fully Optimized     Join Date: Feb 2005 Location: US Posts: 2,193 Re: Finding the correct angle? I got bored, so tried. That's a hard one. You gotta know like trig or something to get it I think. I at least found you can find the right triangle and use the Pythagorean Theorem to find the hypotenuse (distance from point A to top of point B). Distance in feet at 5.21 miles is 275808.8ft. Distance from point A to top of point B is 27511.263567608ft The other distance is 368ft, though it shouldn't be important. Kinda hard to draw a triangle in text, so I hope you get it... From there you can find the angle somehow, I tried several different approaches and had no idea what I was doing...lol. __________________
04-26-2008, 10:18 PM   #4
Fully Optimized

Join Date: Nov 2006
Posts: 3,629
Re: Finding the correct angle?

Quote:
 Originally Posted by Jesusfrk611 I got bored, so tried. That's a hard one. You gotta know like trig or something to get it I think. I at least found you can find the right triangle and use the Pythagorean Theorem to find the hypotenuse (distance from point A to top of point B). Distance in feet at 5.21 miles is 275808.8ft. Distance from point A to top of point B is 27511.263567608ft The other distance is 368ft, though it shouldn't be important. Kinda hard to draw a triangle in text, so I hope you get it... From there you can find the angle somehow, I tried several different approaches and had no idea what I was doing...lol.
I'll hit you up with some rep for trying I've got the answer now but I won't put it up just yet. I want to see if anyone can answer it.
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 04-26-2008, 10:24 PM #5 Golden Master     Join Date: May 2006 Posts: 7,904 Re: Finding the correct angle? SOACAHTOA!!!! lol, but I dont want to calculate it right now... Maybe in the morning... __________________ “Adults are just obsolete children and the hell with them.” - Dr. Suess
 04-27-2008, 04:29 PM #6 Site Team     Join Date: Dec 2002 Posts: 15,233 Re: Finding the correct angle? I hope I'm on the right track with this!! 2170-1802 = 368 368/27511 (opp/adj) = 0.01........ etc Inverse tan 0.01 = 0.5 degrees __________________ [url=http://www.LNXPS.NET]LNXPS.NET - The XPS Library]
 04-27-2008, 04:34 PM #7 Fully Optimized   Join Date: Nov 2006 Posts: 3,629 Re: Finding the correct angle? Thanks and you were pretty close! Here is the full formula. Imagine points A and B onto a graph, with the coordinates of A (x,y) be (0,1802). The x-coordinate for point B will be the 27508.8 we got, and the y will be 2170, so the coordinate will be (27508.8, 2170). Now since I can make an imaginary right triangle, the angle x is just the inverse tangent of the y difference divided by the x difference. x = atan (2170-1802)/(27508.8) x = .766430713988... (degree) which rounds to x = .766 degree __________________
 04-27-2008, 04:39 PM #8 Site Team     Join Date: Dec 2002 Posts: 15,233 Re: Finding the correct angle? Atleast I was close. I forgot to put 368/27511 in brackets!! __________________ __________________ [url=http://www.LNXPS.NET]LNXPS.NET - The XPS Library]