Question

Which vectors are unit vectors? The information is on the picture.

Answer 1

Answer:

Step-by-step explanation:

Unit vector is a vector with mangnitue 1 and we can find out the magnitude of the vector $u = (x , y)$ with the following formula

$magnitude = \sqrt{x^{2}+y^{2}}$

So in the given options whichever vector has magnitude 1 it will be a unit vector.

So if we put the values in the above mentioned formula

1.Magnitude of option A is not 1 so it is not a unit vector

2.Magnitude of option B is  1 so it is a unit vector

3.Magnitude of option C is  1 so it is a unit vector

4.Magnitude of option D is not 1 so it is not a unit vector