Comment #1 on issue 3058 by [email protected]: solve cannot handle mixed trig functions
http://code.google.com/p/sympy/issues/detail?id=3058
I have just checked against the version in the repository and the result is better but not as simple as it could be:
from sympy import * x = Symbol('x') solve(2*sin(x)-cos(x),x)
[-2*atan(2 + sqrt(5)), -2*atan(-sqrt(5) + 2)]
solve(2*sin(x)/cos(x)-S(1),x)
[-2*atan(2 + sqrt(5)), -2*atan(-sqrt(5) + 2)]
solve(sin(x)/cos(x)-S(1)/2,x)
[-2*atan(2 + sqrt(5)), -2*atan(-sqrt(5) + 2)]
solve(tan(x)-S(1)/2,x)
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