When A→⋅B→$$=$$−|A||B| then

Correct option is 3A→ and B→ act in the opposite direction

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When $\vec{A} \cdot \vec{B} = - | A | | B |$ then

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A→ and B→ are perpendicular to each other

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detailed solution

Correct option is C

A→⋅B→=ABcos⁡θ In the problem A→⋅B→=−AB , i.e., cos⁡θ=−1 ∴ θ=180∘ i.e. A→ and B→ acts in the opposite direction.

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When A→⋅B→=−|A||B| then

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When $\vec{A} \cdot \vec{B} = - | A | | B |$ then