This is a splecial case and you can see it is of form f(x)g(x) = 1 where f(x) is 1 + sinx and g(x) = 1/x2 Direct Solution of above form is eg(x) (f(x) -1) Put f(x) and g(x) and get the required answer. If you need the prove for the result please reply on this thread.
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