how can I find angle of curve of specific point?

Hello

I found specific point, but how can I find angle of curve on this point?

Answer 1

[KSSV]

You cannot find an angle for a point.....you need to have an other point. Pick up any neighbor point and calculate slope, inverse tan of it the angle.

[wisam kh]

Thank you But I want to know the angle of the ridge at this point