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Math question About Truespace Archives These pages are a copy of the official truespace forums prior to their removal somewhere around 2011. They are retained here for archive purposes only. Math question // Roundtable 1  |   Order by default Post by bill // Aug 20, 2006, 12:18pm bill Total Posts: 114 Back when I was much younger and my mind had not slipped I knew how to do this. Can someone give me a formula that will calculate the angle as illustrated below? As line segment AB travels around the circle the lines TX and TZ will adjust accordingly. TX and TZ are known quantities. How do I calculate the angle? Post by RichLevy // Aug 20, 2006, 1:30pm RichLevy Total Posts: 1140 I stand a very good chance of falling directly on my face with this :D, but here it goes... SAH=Sin(add/hyp)=theta CAH=Cos(add/hyp)-theta TOA=Tan(add/opp)=theta TX=add TZ=opp not labeled is the hyp so, the formula is Tan(TZ/TX)= angle A MAn I hope I got that right, I haven't done a wood roof in more than a couple of years so I am slightly out of practice :) Rich Please, please be right lol Post by bill // Aug 20, 2006, 2:38pm bill Total Posts: 114 I stand a very good chance of falling directly on my face with this :D, but here it goes... SAH=Sin(add/hyp)=theta CAH=Cos(add/hyp)-theta TOA=Tan(add/opp)=theta TX=add TZ=opp not labeled is the hyp so, the formula is Tan(TZ/TX)= angle A MAn I hope I got that right, I haven't done a wood roof in more than a couple of years so I am slightly out of practice :) Rich Please, please be right lol Ohhhh...so close!!!! Not correct but you got me to where I needed to go. The correct answer is Atan(TZ/TX). Please select from one of the lovely door prizes on the way out :). Thanks for your help. I was stumped there for awhile. Post by RichLevy // Aug 20, 2006, 3:55pm RichLevy Total Posts: 1140 If I had a scientific calculator I would have gotten that :) the inverse at the end was something I was thinking about when I had posted the message... but it's been awhile lol. Glad it got you pointed in the right direction though. Rich

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