A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Two vector A=(3, 4, -5) and B=(-1, 1, 2). Determine the magnitude of A+B and the direction (angle) of A+B ?

  • This Question is Closed
  1. misty1212
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    HI!!

  2. misty1212
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    did you find \(A+B\)?

  3. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Yes, it is \[\sqrt{38}\] and the angle I found is 121 but the answer it the book says it is 71 =(

  4. misty1212
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    oh how did you find the angle (i actually am not sure what angle means in three dimensions)

  5. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    A.B( dot product) = \[\left| A \right|.\left| B \right|\] .cos

  6. misty1212
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    doesn't that find the angle between the two vectors?

  7. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Yes, think the book has the wrong answer! thank you anyway ^^

  8. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.