On 9/2/10 6:34 AM, Poul Riis wrote:
> Maxima returns something not very useful when typing
> solve(2*cos(x)^2*x0-2*sin(x)*cos(x)*y0=x0,x);
>
> - an equation which can rather easily be solved by hand.
> Is there a kind of 'trigsolve' which can automatically solve
> trigonometric equations other than rather trivial ones?
>
I was going to recommend using to_poly_solve:
to_poly_solve(2*cos(x)^2*x0-2*sin(x)*cos(x)*y0=x0,x);
->
[[x=%r2], [x=%r1]]
which is clearly wrong since the equation is not an identity.
Bummer.
Ray