Vector problem -- Find the angle between vector A and vector B

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1. Jan 3, 2018

Vatsal Goyal

1. The problem statement, all variables and given/known data
Vector A + Vector B + Vector C = 0
A=B+C

2. Relevant equations
Find the angle between vector A and vector B

3. The attempt at a solution

I tried to solve this problem by resolving all the vectors and individually equating the value of vectors at each axes x, y and z to 0 but got nowhere with it.

2. Jan 3, 2018

3. Jan 3, 2018

Vatsal Goyal

I got the answer by using a different approach.

4. Jan 3, 2018

Vatsal Goyal

Here is my solution

5. Jan 3, 2018

scottdave

It looks like you figured it out.

6. Jan 3, 2018

Ray Vickson

Why would you post a sideways image? I will not lie down on my desk in order to read your work.

Anyway, the PF standard is to type out your work, not to post images of it, unless that is unavoidable, such as when you include diagrams, etc.

7. Jan 4, 2018

Vatsal Goyal

Sorry, would keep that in mind next time I ask a question. Thank you.

8. Jan 4, 2018

scottdave

You did more than some. Some people make no attempt or simply state "I have no clue".
I realize that it is easy to snap a picture, especially if you have already worked it out on paper. But keep in mind ways to maximize the amount of help you can get. When I am on my phone, I will usually skip participating if a major part of the post is an image. Usually, it is too small for me to make out what is in the image.

9. Jan 4, 2018

Vatsal Goyal

Thank you! Would try to avoid that next time. :)