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If vec a , vec b ,a n d vec c are three...

If ` vec a , vec b ,a n d vec c` are three non-coplanar vectors, then find the value of `( vec a .( vec bxx vec c))/( vec b .( vec cxx vec a))+( vec b .( vec cxx vec a))/( vec c .( vec axx vec b))+( vec c . ( vec bxx vec a))/( vec a . ( vec bxx vec c))`

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Since ` (veca vecb vecc] ne 0`, we have
`(veca.(vecbxxvecc))/(vecb.(veccxxveca))+(vecb.(veccxxveca))/(vecc.(vecaxxvecb))+(vecc.(vecbxxveca))/(veca.(vecbxxvecc))=([veca vecb vecc])/([vecb vecc veca])+([vecbveccveca])/([vecc veca vecb])+([vecc vecb veca])/([veca vecb vecc])`
`= ([vecavecb vecc])/([veca vecbvecc])+([vecavecbvecc])/([vecavecbvecc])-([vecavecbvecc])/([veca vecb vecc])`
= 1+ 1 -1=1
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