Class CBSE Class 12 Mathematics Vector Algebra Q #1794
KNOWLEDGE BASED 3 Marks 2026 AISSCE(Board Exam) SA
If $\vec{a}$, $\vec{b}$ and $\vec{c}$ are unit vectors, then prove that $|\vec{a}-\vec{b}|^{2}+|\vec{b}-\vec{c}|^{2}+|\vec{c}-\vec{a}|^{2}\le 9$.