u know, i have done the above proof, i.e,
curl of (A χ B)
but it came out to be (B .\nabla)A-B(\nabla . A)-(A.\nabla) B+ A (\nabla . B)
u see, i am just a beginner in this topic, and i didn't do it like u did it. instead i broke it down all the way and did it. I know it is stupid but i was...