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Per NCERT §5.1.1 (scalar product), A · B equals which expression?
AA B (no factor)
BA B cos θ
CA B sin θ
DA B tan θ
Answer & Solution
Correct answer: B. A B cos θ
NCERT §5.1.1: scalar (dot) product A · B = AB cos θ. Maximum at θ = 0; zero at θ = 90°.
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