Dominique Laurain wrote:
Where to start : http://www.sagemath.org/doc/reference/calculus/sage/symbolic/relation.html read solve() Read: http://www.google.fr/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0CDIQFjAB&url=http%3A%2F%2Fwww.csulb.edu%2F~woollett%2Fmbe4solve.pdf&ei=rlhbU6_-BMXgOvLlgcgP&usg=AFQjCNHgkg8ryusZlGzg19QM7ogKmufo4A&sig2=tYRBajv8jhJmWVbA9_6R0A
Read: http://www.csulb.edu/~woollett/mbe4solve.pdf ;-) -leif
quote chapter 4.1.1: " Maxima's ability to solve equations is limited, but progress is being made in this area. " I guess (because I don't know so much about Maxima symbolic) ... that differential equations are handled better in symbolic computations (for various maths reasons : solving quadratics, using Laplace transform...)...and I have little hope that solve() can find discrete or generic solutions like those in your system of two equations. One better try would be to get one single equation f(A,d) = ( A*cos(d) - c1 )^2 + ( A*sin(d) - c2 )^2 ; solve(f(A,d) == 0,A,d)...but the point is: you must understand that every "problem" must be set as math in the simplest form.The best solver cannot try all the transformations and all maths identifites ( with sometimes abstract concepts as extending the field of "numeric" solutions ).
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