I am totally lost on this problem and I don't know where to begin.(adsbygoogle = window.adsbygoogle || []).push({});

If a and b are unit vectors that make an angle of 60 degrees with each other, calculate

l 3a - 5b l

the and and b have a carat of top of them

Can someone help me get 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!

# Homework Help: Unit vectors

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