Little explorations with HP calculators (no Prime)

03302017, 09:22 PM
(This post was last modified: 03302017 09:25 PM by Dieter.)
Post: #84




RE: Little explorations with the HP calculators
(03302017 08:19 PM)Han Wrote: Here's what I came up with using basic trigonometry. It turns out I made a typo in my calculations when I posted 76.32 earlier (I used 38 instead of 39 for \( \angle CEA \) ). Maple claims the angle is approximately 81.00000016; I am wondering if the exact solution is actually 81 (changed typo from 80 to 81) For the record: I tried an... err... "very conventional" approach and did a drawing to scale in OO Draw. ;) From this I obtained an angle of 81° as well (say ±0,2°). So this seems to be correct. But I wonder if there is no easier solution to this problem. @Gerson: So <BED is not 90° but the omnipresent 111°. Maybe this gives one more clue here. Dieter 

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