Modern Geometry

[jann]

Let R=(1,4,6,-5) and S=(-2,4,-7,3) Find
a) the component of R along S
b) the projection of R along S
c) the cosine of the angle between the two vectors
d) find the unit vector parallel to R-S

 

[galactus]

Let R=(1,4,6,-5) and S=(-2,4,-7,3) Find

a) the component of R along S

Find the dot product of R and S. Then, divide that by the square of the norm of S.

Multiply that scalar result by the S vector.

 

[jann]

First thanks for your reply!!

OK I am totally lost-this class has no textbook and my notes contain a "bunch " of letters with no examples. Is this much correct-43/sq. of 78? Now I'm lost again!