# Math Help - vector direction

1. ## vector direction

True or false--
the unit vector in the direction of <4, -3> is <4/5, 3/5>.

I say true, am I correct?

When I used the direction formula, I came up with <4/5, -3/5>. Is this the same vector as <4/5, 3/5>?

2. the unit vector will either be <4/5, <-3/5> or the exact oposite of the that vector which is <-4/5, 3/5>

3. ok, these are the choices I'm given.

Unit vector in direction of <4, -3> is:

a. <4/25, -3/25>

b. <4/sqrt7, -3/sqrt7>

c. <4/5, 3/5>

Would it be c?

4. Originally Posted by live_laugh_luv27
ok, these are the choices I'm given.
Unit vector in direction of <4, -3> is:
a. <4/25, -3/25>
b. <4/sqrt7, -3/sqrt7>
c. <4/5, 3/5>
As written the answer is not given.

The answer is $\left\langle {\frac{4}{5},\frac{{ - 3}}{5}} \right\rangle$.