Question

Find a unit vector parallel to the vector `-3hati+4hatj`.

Answer 1

let `a=-3hati+4hatj`
then, `|a|=sqrt((-3)^(2)+(4)^(2))=5`
`therefore`Unit vector parallel to `a=hata=(1)/(|a|)*a`
`=(-3hati+4hatj)/(5)=(-3)/(5)hati+(4)/(5) hatj`