Vectors - dot product and cross product?

[onceinalifetim]

Vectors -- dot product and cross product?

Hello

may i know when to dot product and cross product?? both look to same to me..

 

[NascentOxygen]

The formula will tell you which to use, so pay close attention.

Basically, the dot product produces a scalar result---it has a magnitude and a + or - sign---but it isn't a vector. The cross product produces an answer which is itself a vector, and it's at right-angles to the plane containing the two vectors you multiplied.

 

[berkeman]

Hello

may i know when to dot product and cross product?? both look to same to me..

Dot products, cross products, and other basic vector operations are described here:

http://en.wikipedia.org/wiki/Euclidean_vector

.