If a- b-c- are unit vectors such that a-b-c-0 then the value of a-b-b-c-c-a- isabc -3-2d None of these

(c)We have,a+b+c=0 and a^2=1,b^2=1,c^2=1 ∵ (a+b+c)(a+b+c)=0 ⇒a^2+a.b+a.c+b.a+b^2+b.c+c.a+c.b+c^2=0 ⇒ a^2+b^2+c^2+2(a. ...

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Fundamental Theorem In 3D

If a⃗, b⃗c⃗ a...

Question

$I f \to a, \to b \to c a r e u n i t v e c t o r s s u c h t h a t \to a + \to b + \to c = \to 0, t h e n t h e v a l u e o f \to a . \to b + \to b . \to c + \to c . \to a i s$

(a) 1 (b) 3

(c) $\frac{- 3}{2}$ (d) None of these

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