- #1

- 28

- 0

## Homework Statement

By using a suitable vector identity for ∇ × (φA), where φ(r) is a scalar field and A(r) is a vector field, show that

- ∇ × (φ∇φ) = 0,

where φ(r) is any scalar field.

## Homework Equations

∇×(φA) = (∇φ)×A+φ(∇×A)?

## The Attempt at a Solution

I honestly have no idea how to even start this one. Any help would be hugely appreciated.