So, can we suggest that electric field inside an infinite hollow cylinder with charge on the inner surface is 0 ?

I tried to this problem analytically assuming the cylinder to be made of many infinite lines of thickness R*d(theta) , of which i know the contribution to the electric field. Adding the vector components and relating them through the projected triangle, and using cosine law, i get an integral that is very complex to solve..Solving it online, gave me 2 different answers

. I just cant figure out the method to do this.

Simply put, my question is what is the electric field inside an infinite hollow cylinder with charge on inner surface?