I have this question in my book:-(adsbygoogle = window.adsbygoogle || []).push({});

find the angle between the two vectors:

A= i - 2j + 3k

B= 2i + 3j -2k

the solution is based on the scalar product rule.. (so the question is solved)...

I`m just tryin to find another way to solve the problem? because I`m not really confident of vectors..

I have a questions also:-

Find the vector product of the two vectors:

A= i - 2j + 3k

B= 2i + 3j -2k

now the answer is: -5i+8j+7k..

now how could that resultant vector be perperndicular on A and B? it seems to have a "not right" angle (not 90 degree angle)..

because if the origion is 0,0,0.. then -5i +8j+7k makes a "non right" angle (it would only be right if the answer was 0,0,xk where x is any number)

if I`m mistaken about the origion being 0,0,0 then what is it?

by the way, I`ve asked this question on "Y! asnwers", but none answered, so I`m posting here..

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# Homework Help: Question concerning vectors

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