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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