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Hi there

A picture attached for visualization.

3.

General formula

Thanks for any help.

- I'm having a hard time trying to understand how come ∂r^/∂Φ = Φ^ ,∂Φ/∂Φ = -r^ -> these 2 are properties that lead to general formula.
- I've been thinking about it and I couldn't explain it. I understand every step of "how to get Divergence of a vector function in Cylindrical Coordinates" except for these formulas below.

3.

Thanks for any help.