Let be nonzero vectors and
Prove that has the same direction as
.
Proof. To show that and
have the same direction we must show that there exists a constant
such that
. So, we compute,
Let be nonzero vectors and
Prove that has the same direction as
.
Proof. To show that and
have the same direction we must show that there exists a constant
such that
. So, we compute,