Asked by Jed
                 Find a formula for the function f(x) such that f′(x)=cos(x)/x and f(2)=3.
            
            
        Answers
                    Answered by
            oobleck
            
    cosx/x has no antiderivative in terms of elementary functions.
But using the Ci function,
f(x) = Ci(x) - Ci(2) + 3
    
But using the Ci function,
f(x) = Ci(x) - Ci(2) + 3
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