Find the angle between the vectors. (First find an exact expression and then approximate to the nearest degree.) a = (1, - 4, 1)
b = (0, 2,-2)

And replacing we got:

And we can find the angle with the inverse cosine function and we got:

Step-by-step explanation:

for this case we can use the following identity:

We can begin finding the norm for each vector and we got:

Now we can find the dot product and we got:

And replacing we got:

And we can find the angle with the inverse cosine function and we got:

there is no question content here, but you for the free points! : d

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