![Which one of the following functions is analytic over the entire complex plane?](https://www.gkseries.com/blog/wp-content/uploads/2023/08/Which-one-of-the-following-functions-is-analytic-over-the-entire-complex-plane.jpg)
Q. Which one of the following functions is analytic over the entire complex plane?
![](https://www.gkseries.com/blog/wp-content/uploads/2023/08/Screenshot-514.png)
Ans: cos (z)
![](https://www.gkseries.com/blog/wp-content/uploads/2023/08/image-6.png)
Q. Which one of the following functions is analytic over the entire complex plane?
Ans: cos (z)
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