How do I solve the dot and cross product of 3i and jxk?

[jdawg]

Homework Statement

The value of 3i(dot)(jxk)

Homework Equations

The Attempt at a Solution

I know the answer is 3, but could someone please explain how to work this problem?

 

[jackarms]

Start by evaluating the cross product. You can go through the matrix and determinants to solve for it, but j x k can be evaluated by just thinking about it -- what vector is perpendicular to both j and k, and follows the right-hand rule?

Then you can evaluate the dot product by component.

 

[jdawg]

Ohh! Thank you so much, I get it now :)