how can one remember the formulas involving del cross and dot product with other vectors

Question

ipwnbunnies · Answer

:3 What do you mean remember? Dot product is simple.

ipwnbunnies · Answer

Cross product, just remember how to take determinants.

ipwnbunnies · Answer

Divergence: del dot F
Curl: del cross F

anonymous · Answer

not those. like ...
del X A X B

anonymous · Answer

= A del.B - B del.A + (B.del) A - (A.del) B
do u know abt this??

ipwnbunnies · Answer

Um, I'm not sure. I don't use a formula when evaluating cross product.

anonymous · Answer

those are vector identies.

phi · Answer

Get a tattoo in a discreet space ?

anonymous · Answer

thats a good idea. but most of my skin is already booked

ipwnbunnies · Answer

Lol.

phi · Answer

The Greeks thought that writing things down on paper would ruin people's memory... they would get lazy and not bother to memorize the Illiad (for example).  They were right!
But I think if you *really* want to memorize it, you will.  It's only a few characters, not a whole book

anonymous · Answer

thx