Hi,

This is my first post on the forum, but I have been reading this forum for at least 2 years now. It has always been very useful to read some of the posts you guys make.

However, now, it seems like I can't solve my problem simply by reading the forum...I would need a little extra help.

Here is how it goes:

*(Note: Let bold letters be vectors)*
I know that

**u**=(u1,u2,u3),

**v**=(v1,v2,v3) and

**w**=(w1,w2,w3)

Let A=

I have to prove that:

*(Note: Let u,v and w, be vectors)*
det(A)

I tried to replace the norm of

**u** times norm of

**v** times norm of

**w** by its equivalent using their values (u1,u2,u3), (v1,v2,v3), (w1,w2,w3).

Hence,

...

But then, all I got was a huge equation and the strange impression that I am not even close from doing the right thing...

Anyone could help me head in the right direction ?

Thanks a lot !