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If (veca xx vecb) xx (vec c xx vecd)=h ...

If `(veca xx vecb) xx (vec c xx vecd)=h veca+k vecb=r vec c+s vecd`, where `veca, vecb` are non-collinear and `vec c, vec d` are also non-collinear then :

A

`h=[vecb vec c vecd]`

B

`k=[veca vec c vecd]`

C

`r=[veca vecb vecd]`

D

`s= -[veca vecb vec c]`

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The correct Answer is:
B, C, D
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VIKAS GUPTA (BLACK BOOK)-VECTOR & 3DIMENSIONAL GEOMETRY-Exercise-2 : One or More than One Answer is/are Correct
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  12. If (veca xx vecb) xx (vec c xx vecd)=h veca+k vecb=r vec c+s vecd, wh...

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  19. Which of the following statement(s) is/are incorrect ?

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