# Integral of cos(1/x)

1. Apr 13, 2015

### Emmanuel_Euler

what is the integral of cos(1/x) dx ??

2. Apr 13, 2015

### Delta²

3. Apr 13, 2015

### Emmanuel_Euler

thank for help (delta)

4. Apr 14, 2015

### HallsofIvy

Staff Emeritus
You have posted a number of these "What is the integral of ... ". Do you understand that very few function can be integrated in terms of elementary functions?