- #1

- 53

- 0

## Homework Statement

Assuming that ∅ is a differentiable scalar valued function and

**F**a differentiable vector field, derive the following identities.

a)∇(dotted with)(∅

**F**) = ∇∅(dotted with)

**F**+ ∅∇(dotted with)

**F**

b)∇(crossed with)(∅

**F**) = ∇∅(crossed with)

**F**+ ∅∇(crossed with)

**F**

## Homework Equations

## The Attempt at a Solution

Honestly don't know where to start.