Question

Prove that If u.v =0, then u proj on v for all u, v E Rcubed.

I'm thinking uvcosx has to equal zero. therefore u or v has to be zero for uvcosx to be zero. thus, cosx = 1

Answer 1

help pls

Answer 2

u.v = 0 means that the vectors are orthogonal

Answer 3

orthogonal means 90 degrees from each other

Answer 4

cosx=0 mean x=90 degrees

Answer 5

what constitutes "proof" i was never good at :)