Little explorations with HP calculators (no Prime)
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03-30-2017, 10:41 PM
(This post was last modified: 03-30-2017 10:42 PM by Han.)
Post: #86
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RE: Little explorations with the HP calculators
For an exact answer, my hunch is that this problem probably makes use of some basic trig identities like \( \sin(2A) = 2\sin(A)\cos(A) \) and properties of sine and cosine (e.g. \( \sin(A) = \sin(180-A) \)) (and possibly more; e.g. sine and cosine of sum/difference of angles) in addition to the law of sines.
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