How to erase or cut the line drawn by pen tool

Hi there,

Thanks for reaching out. In additions to the earlier responses given by Scott and Myra, I'd suggest to look into the help article https://helpx.adobe.com/illustrator/using/cutting-dividing-objects.html for more information about cutting, dividing and trimming the objects.

Hope it helps.

Regards,

Ashutosh

As in many Adobe products, there are lots of ways to perform the same task. In this case, because you have 2 shapes and you want 1 of them to be cut at the intersection of them, I would recommend using the Shape Builder Tool. Select both the circle and the curve first. Then select the Shape Builder Tool (Shift + M is the keyboard shortcut). Hold down Alt (or Option if you're on a Mac). Hover over the portion of the curve you want to remove. Various parts will highlight as you hover over them. The portion of the path inside the circle will turn red. Click it to remove it.

Turn on Smart Guides and use the knife tool. Click where the hair and hte head intersect. The topmost path will be cut where you clicked.