Little explorations with HP calculators (no Prime)

04062017, 12:47 AM
(This post was last modified: 04072017 08:22 PM by SlideRule.)
Post: #121




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° SSS equation BE = sin(84°)/sin(18°)  sin(63°)/sin(39°) ≊ 1.802517077 ED = BE² + BD²  (2·BE·BD·cos18°) ≊ 0.7167358991 SAS equation BD = sin(78°)/sin(18°)  AD ≊ 2.165352128 AD = 1 BEST! SlideRule ps: hopefully, NO typos! 

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