Vector Algebra
Oswaal
CBSE
Grade 12
Question:
If $\vec{a}, \vec{b}$ are unit vectors, then $|\vec{a} + \vec{b}|$ is maximum when angle $\theta$ is:
(a) $0$
(b) $\pi/2$
(c) $\pi$
(d) $\pi/3$
Step-by-Step Solution
Key Concept: |a+b| = 2 cos(\theta/2) is max 2 at \theta = 0.
The detailed step-by-step mathematical proof is available inside the Mathbee app workspace.
Correct Answer: $0$
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