solve trigonometric equation [closed]
how to slove this equation in sagemath and get a sloution t1 = f(t2)
(cos(t1)cos(t2) - sin(t1)sin(t2) - cos(t1))(cos(t2)sin(t1) + (cos(t1) + 1)sin(t2)) - ((cos(t1) - 1)cos(t2) - sin(t1)sin(t2))(cos(t2)sin(t1) + cos(t1)sin(t2) + sin(t1)) ==0
duplicate of https://ask.sagemath.org/question/502...