While the lerp expression eases out, I'd like to ease in as well. Is there an expression that will allow this?

I've done a search, and found a list of examples, including a great one by Yann, but unfortunately it's over my head. I simply don't seem to grasp function parameters yet.

I'm looking to have an angle that smoothly transitions from one to another. ATM I'm using lerp, and the sudden start is a little disorientating.

Any help would be appreciated.