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Angle between the vectors $(\hat{i} + \hat{j}) and (\hat{j} - \hat{k})$ is

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Correct option is D

cos⁡θ=A→⋅B→|A→∥B→|=122=12 ∴ θ=60∘

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Angle between the vectors (i^+j^) and (j^−k^) is

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Angle between the vectors $(\hat{i} + \hat{j}) and (\hat{j} - \hat{k})$ is