Question

A Question on Vectors

Answer 1

If A=i+j+k
B= -3i +4j -2k

Find the angle between this vectors

Answer 2

the formula for finding the angle between vectors is
$$\cos x = \frac{\vec A \cdot \vec B}{|A||B|}$$

Answer 3

Can you please illustrate , So that i can try the next similar questions when i get the concept

Answer 4

sure. can you take the dot product of the two vectors?

Answer 5

i will notify you afterwards , i have problem with internet
Thank you :))

Answer 6

simple proof from cos law
http://mathproofs.blogspot.ca/2006/07/dot-product-and-cosine.html