DrMoriarty/sympy — pull request #4 by mkotov (2013-12-25 22:06:51+00:00)
Title: added a code for solving equations containing abs-symbol, equations cont...

(1) Equations containing abs
(2) Equations containing arctrig
(3) Equations of the form cos(f(x)) + cos(g(x)) = 0
(4) Equations of the form sin(f(x)) + sin(g(x)) = 0
(5) Tests
(6) Refactoring