If ∣ A × B ∣ = 3 A ⋅ B then the value of ∣ A + B ∣ is:NEET 2004

According to the question A × B = 3 A ⋅ B A B sin = 3 A B cos θ ⇒ tan θ = 3 ⇒ θ = 6 0 ∘ ⇒ ∣ A + B ∣ = ∣ A ∣ 2 + ∣ B ∣ 2 + 2∣ A ∣ B ∣ cos θ

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Physics - Vectors Question with Solution | TestHub

PhysicsVectorsMultiplication of vectorsMedium2 minPYQ_2004

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If $∣ A \times B ∣ = 3 A \cdot B$ then the value of $∣ A + B ∣$ is:NEET 2004

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According to the question $A \times B = 3 A \cdot B A B sin = 3 A B cos θ \Rightarrow tan θ = 3 \Rightarrow θ = 6 0^{\circ} \Rightarrow ∣ A + B ∣ = ∣ A ∣^{2} + ∣ B ∣^{2} + 2∣ A ∣ \overline{B ∣ cos θ}$

Stream:NEETSubject:PhysicsTopic:VectorsSubtopic:Multiplication of vectors

⏱ 2mℹ️ Source: PYQ_2004

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