Little explorations with HP calculators (no Prime)
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04-06-2017, 12:47 AM
(This post was last modified: 04-07-2017 08:22 PM by SlideRule.)
Post: #121
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RE: Little explorations with the HP calculators
... I share one solution ...
Here's my solution to post #67, page 4, Triangle Problem. ∠EDC = 180° - (∠D + 48°) ≊ 81° where ∠D = acos[(ED² + BD² - BE²)/(2·ED·BD)] ≊ 51° S-S-S equation BE = sin(84°)/sin(18°) - sin(63°)/sin(39°) ≊ 1.802517077 ED = BE² + BD² - (2·BE·BD·cos18°) ≊ 0.7167358991 S-A-S equation BD = sin(78°)/sin(18°) - AD ≊ 2.165352128 AD = 1 BEST! SlideRule ps: hopefully, NO typos! |
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