Fix lisp error from quad_qawf when given an invalid trig arg

[maxima.git] / demo / solve.dem

pyth:a^2+b^2=c^2;

solve(pyth,b);

eq1: x+y=1/2;
eq2: 2*x+2*y=1;

solve([eq1,eq2],x);

eq3: x^2+y^2=1;

solve([eq1,eq3], [x,y]);