MathGroup Archive 2001

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Re: Trigonometry, sine theorem.

  • To: mathgroup at smc.vnet.net
  • Subject: [mg30758] Re: Trigonometry, sine theorem.
  • From: "Orestis Vantzos" <atelesforos at hotmail.com>
  • Date: Sun, 9 Sep 2001 03:27:09 -0400 (EDT)
  • Organization: National Technical University of Athens, Greece
  • References: <9ncfvr$pu3$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

In[47]:=
a = 75; b = 67; c = 117;

In[57]:=
N[ArcCos @@ (cosA /. Solve[a^2 == b^2 + c^2 - 2*b*c*cosA, cosA])/Degree]

Out[57]=
36.80528562828013

N[ArcCos @@ (cosB /. Solve[b^2 == c^2 + a^2 - 2*c*a*cosB, cosB])/Degree]

Out[53]=
32.35705100730148

N[ArcCos @@ (cosC /. Solve[c^2 == b^2 + a^2 - 2*b*a*cosC, cosC])/Degree]

Out[54]=
110.8376633644184




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