- #1

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## Homework Statement

This is part of the proof for curvature.

Prove V X A = k(ds/dt)

^{3}

**B**

**B**is the the binormal vector. I have seen something in the proof with a

**T**X

**N**which I know is

**B**.

## Homework Equations

I have already proven

a(t) = (d

^{2}s/dt

^{2})

**T**+ K(ds/dt)

^{2}

**N**

## The Attempt at a Solution

I have seen some things where you start with v(t), and take the derivative then take a cross product, but I am not sure if this is how my professor wants us to do it. He wants us to use the a(t) part from above to prove it.