Question

tell me the answer of the question!!​

Answer 1

Hi friend here is your answer.

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B) is the answer.

Beacuse if A,B and C will represent x,y and z axis then, A.B will be zero and B.C will be zero So A.B=B.C

Again if B is a null vector then A.B=B.C

And A.B=B.C =>A=C

So A.B= AB cos30°

And B.C=BC cos 150°

=> BC cos (90+60)

=> BC (-sin 60)

Now we can clearly see that A.B is not equal to B.C

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