- #1
amjad-sh
- 246
- 13
- Homework Statement
- In fact, I am working on an condensed matter physics paper, where I reached to an integral of this form: $$\int_{-\infty}^{z} sin(2kz) \, dz$$.
offcourse, I have to solve this integral.
- Relevant Equations
- There is no relevant equations.
##\int_{-\infty}^{z}sin(2kz)\,dz=\dfrac{-1}{2k} \Big [cos(2kz) \Big ]_{-\infty}^z=-\dfrac{cos(2kz)}{2k}+\dfrac{cos(-\infty)}{2k}##.
I ended up here, and I don't know how to proceed.
One recommended me to use contour integration, but I have no idea about it.
I ended up here, and I don't know how to proceed.
One recommended me to use contour integration, but I have no idea about it.