# need these proofs .( level bachelors)Watch

#1
kindly post these proofs
2.grade . ((r cross a) cross b)= -2B.A
in que2 r,A,B ARE VECTORS
0
5 years ago
#2
(Original post by tweety1991)
kindly post these proofs
2.grade . ((r cross a) cross b)= -2B.A
in que2 r,A,B ARE VECTORS
Have you tried elsewhere? DrMaths, Stackexchange maths and similarly themed sites often have a host of proofs available.
1
#3
no
0
5 years ago
#4
(Original post by tweety1991)
no
Try them
0
#5
0
5 years ago
#6
There is something called Google in case you aren't aware.

Peace.
0
#7
i know dear. i searched it from many sites but didnt found anywhere thats y asked for help......and i didnt ask merely you.............
(Original post by WhiteGroupMaths)
There is something called Google in case you aren't aware.

Peace.
0
5 years ago
#8
(Original post by tweety1991)
i know dear. i searched it from many sites but didnt found anywhere thats y asked for help......and i didnt ask merely you.............
You didn't look properly then. It's a basic property of div, grad, curl:

http://math.stackexchange.com/questi.../501237#501237
0
#9
thanks noble i got it.......
(Original post by Noble.)
You didn't look properly then. It's a basic property of div, grad, curl:

http://math.stackexchange.com/questi.../501237#501237
0
5 years ago
#10
(Original post by tweety1991)
kindly post these proofs
2.grade . ((r cross a) cross b)= -2B.A
in que2 r,A,B ARE VECTORS
They're easily proved using suffix notation (and/or considering them componentwise).
0
5 years ago
#11
(Original post by tweety1991)
i know dear. i searched it from many sites but didnt found anywhere thats y asked for help......and i didnt ask merely you.............
Oh yes I am SURE you did search high and low. Left and right too probably.

Peace.
0
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