How to create a wavy or a Sinusoidal pattern at the edge of a hemisphere?

Hello guys,

I have been stuck at a problem here, I cant think of a way of creating a wavy pattern at the edge of a hemisphere that I have created. I have attached a picture and highlighted, how and where I want the pattern and along with it, my sphere, on which I want that pattern.

I will be very thankful to you guys in helping me out with this problem. Thank you

I am using solidworks 2018 version.

SolidworksGeneral