If a, b, c are any three coplanar unit vectors, then - Vidyadip

MCQ

If $a, b, c $ are any three coplanar unit vectors, then

A
$a\,.\,(b \times c) = 1$
B
$a\,.\,(b \times c) = 3$
✓
$(a \times b)\,.\,c = 0$
D
$(c \times a)\,.\,b = 1$

✓

Answer

Correct option: C.

$(a \times b)\,.\,c = 0$

c
(c) $a.(b \times c) = 0$ or $(a \times b).c = 0.$

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