Tuesday

September 23, 2014

September 23, 2014

Posted by **Tabby** on Sunday, April 22, 2012 at 7:32pm.

Someone help me please?

- Sum Of Unit Vectors? -
**Reiny**, Sunday, April 22, 2012 at 8:52pmvector MN = [6+3/4 , -9-5 , 3/5-2/3]

= [ 27/4 , - 14 , -1/15]

magnitude of MN = √(729/16+ 196 + 1/225)

= √(870354/3600)

= appr. 15.549

so a unit vector in the direction of MN

= 1/15.549 [27/4, -14, -1/15]

= [ .434 , -.900 , -.004]

check: .434^2 + (-.9)^2 + (.004)^2 = .99918 (very close to 1, that's good)

so [ .434 , -.900 , -.004]

= .434[1,0,0] - .9[0,1,0] - .004[0,0,1]

- Sum Of Unit Vectors? -
**Tabby**, Sunday, April 22, 2012 at 9:20pmThank you so much for providing a clear explanation!! :)

**Answer this Question**

**Related Questions**

Math - Write XY as the sum of unit vectors for X(8,2,-9)and Y(-12,-1,10). First...

Math - Can the sum of two unit vectors be a unit vector? Can the difference?

PreCalculus - Given vectors u=7i + 3j and v = -4i + 3j, find 5u-4v in terms of ...

math - given that vectors(p+2q) and (5p-4q) are orthogonal,if vectors p and q ...

math - given that vectors(p+2q) and (5p-4q) are orthogonal,if vectors p and q ...

Pre Cal - Find the manitude of each vetcor, and write each vector as the sum of ...

physics-vectors - If the magnitude of the sum of two vectors is greater than the...

Math(repost of #2 of last ?) - Write XY(with line over it) as the sum of unit ...

Calculus and Vectors - THE VECTORS a - 5b AND a-b ARE PERPENDICULAR. IF a AND b ...

Physics - Three vectors, each have a magnitude of 30 units, have their tails at ...