1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Pythagorean Theorem proof Vector Calc. Due tomorrow 9am. PLEASE HELP

  1. Sep 3, 2008 #1
    Pythagorean Theorem proof Vector Calc. Due tomorrow 9am. PLEASE HELP!!

    Prove the Pythagorean theorem. That is, if a,b, and c are vectors in Rn such that a + b = c and a.b = 0, then ||a||2 + ||b||2 = ||c||2. Why is this called the Pythagorean theorem.

    Hint given: Given the hypotheses, you have a right triangle. Why?

    Help please! This is due tomorrow morning and I cannot figure it out.

    ||x||= length of variable
    a.b= dot product
     
  2. jcsd
  3. Sep 3, 2008 #2
    Re: Pythagorean Theorem proof Vector Calc. Due tomorrow 9am. PLEASE HELP!!

    Well what does [tex] a \cdot b = 0 [/tex] tell you about the vectors a and b?
     
  4. Sep 3, 2008 #3

    rock.freak667

    User Avatar
    Homework Helper

    Re: Pythagorean Theorem proof Vector Calc. Due tomorrow 9am. PLEASE HELP!!

    Draw a triangle,explain why the angle is 90 degrees and then think cosine rule.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Pythagorean Theorem proof Vector Calc. Due tomorrow 9am. PLEASE HELP
Loading...