Show that (ai+bj)and (-bi+aj) are perpendicular...(adsbygoogle = window.adsbygoogle || []).push({});

im clueless on what to do ..any hints will be greatly apperciated

thanks

I know Im missing something really simple

Also the book has not yet introduced the scalar product so they want me to use some other way

**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!

# Prove two vectors are perpendicular (2-D)

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