Can you approve of my calculation please? my question and answer are below and its about vectors

Question

ganeshie8 · Answer

looks legit

ganeshie8 · Answer

another method :-
say, $\theta$ is the angle between $\vec{b}$ and $\vec{a}$, 
then  $-\theta$ will be the angle between $\vec{a}$ and $\vec{b}$, 

 $\large \vec{b} \times \vec{a} = |a||b|\sin (\theta) \hat{N}$

$\large \vec{a} \times \vec{b} = |a||b|\sin (- \theta) \hat{N} = -\vec{b} \times \vec{a} $

anonymous · Answer

so it could be written as simple as that?

ganeshie8 · Answer

yup ! i like the second method better

anonymous · Answer

i don't think we studied this formula yet haha .. but how would i improve my method .. that could be better haha

ganeshie8 · Answer

it is a crime to study scalar triple products, w/o knowing this definition for vector product.
i saw u doing scalar triple product problems in ur previous questions :o

anonymous · Answer

oh then maybe we did but i didn't pick it up ill will go over our thing again haha

ganeshie8 · Answer

okay ! but ur method is completely legit.

anonymous · Answer

oh ok so there were no mistakes? if that then i will use that one

ganeshie8 · Answer

i had a cursory glance, it is correct. g

anonymous · Answer

ok thanks

anonymous · Answer

btw is it better to submit questions with answers in this forum or just the question?

ganeshie8 · Answer

you can simply post the question,
and start working it here if u want. thats one way.

if you had worked it already, just take a screenshot and post it and discuss.

if u are stuck on something... then u can simply start the question wid, "I am stuck on this... "

:)

ganeshie8 · Answer

you dont have to post ur work everytime.... but its good to show ur work when u can - that way others know wat exactly u are working on, right...

anonymous · Answer

ok thanks