Question 285406
{{{sqrt(1-cosx)/sqrt(1+cosx)= (1- cosx)/ Abs(sinx)}}}
Square both sides
(1-cos)/(1+cos) = (1-cos)^2/sin^2
Divide by (1-cos
1/(1+cos) = (1-cos)/sin^2
sin^2/(1+cos) = 1-cos
sin^2 = 1 - cos^2
There's no solution, it's an identity.  
It's equal for any value of x.