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Three vectors vecA, vecB and vecC add u...

Three vectors `vecA, vecB ` and `vecC` add up to zero. Find which is false.

A

`(vecAxxvecB)xxvecC`is not zero unless `vecB ,vecC` are paralle.

B

`(vecAxxvecB).vecC` is not zero unless `vecB,vecC` are parallel.

C

If `vecA,vecB,vecC` define a plane,`(vecAxxvecB)xxvecC` is in that plane.

D

`(vecAxxvecB).vecC`=`|vecA||vecB||vecC| rarr C^(2)=A^(2)+B^(2)`.

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