Find II 2e-3f II assuming that e & f are unit vectors such that II e +f II=sqrt(3/2).I tried using the law of cosines but not getting it...

Question

beginnersmind · Answer

Draw e+f, and solve for the angle.

beginnersmind · Answer

Do you need another hint?

anonymous · Answer

not yet, doing math & watching my 3year old and 1 year old sister is interesting...makes solving problems kind of slow...i'll post if i need another hint thanks!

beginnersmind · Answer

Ok, sometimes people get stuck but don't speak up until you ask :(

anonymous · Answer

why am I finding the theta between e & e+f....theta=e dot e+f / sqrt(3/2)...

beginnersmind · Answer

You need theta between e and f.|dw:1335665267401:dw|