JEE Main 2022 Mathematics question
Let , , be three coplanar concurrent vectors such that angles between any two of them is same. If the product of their magnitudes is 14 and then is equal to:
Answer: (3)
Solution
Three coplanar vectors with equal angles between any two make angles of , so = −ab/2, = −bc/2 and = −ca/2. Using \vec{a}\vec{b}\vec{b}\vec{c}$) =
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