Show that x+y and x-y are orthogonal if and only if x and y have the same norms.(adsbygoogle = window.adsbygoogle || []).push({});

Can someone get me started?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Orthogonal vectors

**Physics Forums | Science Articles, Homework Help, Discussion**