How to make a shaping tool the way I want I would be very happy for the tutorial! (I need to make a metal board with waves whose extension is as beautiful as a rib in forming but according to my dimensions and angl

The final product is a metal board with waves that the end of each wave connects to a flat surface in a nice way like the suffix of a quarrel in SolidWorks libraries but because it is at an angle I can not use ready-made libraries because it should be any different length

My problem is with the suffix to make it good in the encounter of the wave with the straight surface