a (b c) is coplanar with - Vidyadip

MCQ

$a \times (b \times c)$ is coplanar with

✓
$b$ and $c$
B
$c$ and $ a$
C
$a $ and $b$
D
$a, b$ and $ c$

✓

Answer

Correct option: A.

$b$ and $c$

a
(a) $b \times c$ is a vector perpendicular to $b,\,c.$ Therefore, $a \times (b \times c)$ is a vector again in plane of $b,\,c.$

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