- #1

- 117

- 0

## Homework Statement

Question 10a of the attached paper.

## Homework Equations

## The Attempt at a Solution

If a matrix is orthogonal, its transpose is its inverse.

The inverse [itex]U^{-1}[/itex] is defined by Ʃ[itex]U^{-1}[/itex]ij Vj = uj

I don't know how to go about proving this. Thanks for any help!