**Summary**: In this tutorial, you will learn to calculate the angle between two vectors using Python Programming language.

Getting the angle between two vectors returns the angle in radians between two vectors of equal dimension.

In Python, you can easily find angle using the `numpy.across()`

method.

## Use numpy.arccos() to get the Angle Between Two Vectors

```
import numpy as np
#vectors
v_1 = [0, 1]
v_2 = [1, 0]
#unit of vectors
unit_v_1 = v_1 / np.linalg.norm(v_1)
unit_v_2 = v_2 / np.linalg.norm(v_2)
#dot product of vectors
dot_product = np.dot(unit_v_1, unit_v_2)
#angle between two vectors
angle = np.arccos(dot_product)
print(angle) #90 degrees in radian
```

**Output**: `1.57079632679`

This method requires you to use lists to represent vectors.

In the program, we have used `vector /`

`np.linalg.norm(vector)`

to get the unit vector of `vector`

. We did this for both vectors.

Then, we called `np.dot(v1, v2)`

method to get the dot product of the previous results `v1`

and `v2`

.

Finally, we called `np.arccos(x)`

method with the previous result as `x`

to get the angle between the two original vectors.

So, this is how you can get the angle between two given vectors in Python.