Published by:
CGP EDU Academic Team
Published on: August 12, 2026
If
and
, then value of
is:
Text Solution
Verified by ExpertsThe correct answer is:
6
(6)

Given value is 9 (very small), so vectors must cancel strongly.
This happens when
are along the same line with suitable opposite directions.
Take

(where
is cube root of unity).
Then

Using
, its modulus becomes 9.
Now,

Substituting and simplifying using



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