Find the angle between the vectors ????=????+???? and ????=−????+????. (Give an exact answer. Use symbolic notation and fraction
s where needed.)
1 answer:
Answer:
The angle between them is 60 degrees
Step-by-step explanation:
Given


Required
The angle between them
The cosine of the angle between them is:

First, calculate a.b

Multiply the coefficients of like terms


Next, calculate |a| and |b|




Recall that:

This gives:



Take arccos of both sides


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Step-by-step explanation:
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Step-by-step explanation:
Add up
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-------------------
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