If , then the angle between and…

MATHEMATICS · Single correct · CBSE · Mathematics · Vector Algebra · Vector Algebra

Problem

If ∣a+b∣>∣a−b∣|\mathbf{a}+\mathbf{b}|>|\mathbf{a}-\mathbf{b}|, then the angle between a\mathbf{a} and b\mathbf{b} is (1) Acute (2) Obtuse (3) π2\frac{\pi}{2} (4) π\pi

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