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Solve Equation

  • To: mathgroup at
  • Subject: [mg20813] Solve Equation
  • From: "Mecit Yaman" <mecit at>
  • Date: Sun, 14 Nov 1999 18:14:01 -0500 (EST)
  • Sender: owner-wri-mathgroup at

i am trying to solve 3 equations on 3 variables. Mathematica is complaining
about trigonometric functions, sin and cosine.

L= 5+4Cos[a]
L=13-12 Cos[b]
L=10 - 6Cos[a+b]

I tried to change
Cos[a]  -> x
Cos[b] -> y
Cos[a+b] - > (x y - Sqrt[1-x x]Sqrt[1- y y])

But this time it only gives me a trivial solution.(L=0)
I am trying to get the solution.

L=7, b=Pi/3 , a= Pi/3*5

Good work , everyone.
MSc student @ University of Cape Town

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