### solve trigonometric equation

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