some one please solve this
Okay, $\displaystyle \int \frac{sin x}{x} dx= Si(x)+ C$.
sin(x)/x, the "sinc function", cannot be integrated in terms of elementary functions- Si(x) is the "sine integral" function and is defined to be $\displaystyle \int \frac{sin x}{x}dx$. See Sinc function - Wikipedia, the free encyclopedia