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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

cosθ = A→.B→|A→||B→| = 122= 12 ∴ θ = 600

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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