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## Homework Statement

Using the cylindrical polar co ordinates ##(ℝ,θ,z)## calculate the gradient of ##f=ℝ sin θ + z^2##

the textbook says that the scale factors are ## h1=1, h2=ℝ & h3=1##

how did they arrive at this?[/B]

## Homework Equations

## The Attempt at a Solution

##h1=|∂f/∂ℝ|= sin θ,

h2=|∂f/∂θ|=ℝ cos θ

h3=|∂f/∂z|=2z##

advice [/B]