Class 12 Vector Algebra · Mcq Single Correct1 Marksdot_product_angle
Class 12 Maths · Vector Algebra · Mcq Single Correct #3
For nonzero vectors a,b with angle θ ∈ [0,π], when is a · b ≥ 0?
✅ Step-by-Step Solution
Final Answer: Option (B): 0 ≤ θ ≤ π/2
- Since |a||b| > 0, the sign is the sign of cos θ, which is nonnegative exactly on [0,π/2].
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