- #1

- 4

- 0

**r**and

**s**are vectors that depend on time, prove that the product rule for differentiating products applies to

**r.s**, that is that:

d/dt (

**r.s**) =

**r.**d

**s**/dt + d

**r**/dt

**.s**

--

I'm not entirely sure how I'm supposed to go about proving this, can anyone point me in the right direction, please?