Subject:
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Re: Geometry
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Newsgroups:
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lugnet.off-topic.geek
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Date:
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Thu, 29 Jul 1999 08:22:14 GMT
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Viewed:
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148 times
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"Don Heyse" <donnell_heyse@adc.spam.go.away.com> writes:
> Perhaps the law of cosines is better:
>
> a*a + b*b + c*c = -2bc*cos(A)
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> Solve for A?
With a, b and c being the length of the sides, and A being the angle of
the edge just opposite of a? Why, that looks just perfect! Thanks!
(I'm used to using A, B and C for the lengths and the corresponding
lowercase letters for the angles, so I was a bit confused at first.)
Fredrik
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Message is in Reply To:
 | | Re: Geometry
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| (...) Reaching way, way back... Can you use the law of sines? sin A / a = sin B / b = sin C / c Seems like there's a step missing though. Perhaps the law of cosines is better: a*a + b*b + c*c = -2bc*cos(A) Solve for A? Anyhow, good luck. Don (25 years ago, 28-Jul-99, to lugnet.off-topic.geek)
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