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

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Correct option is C

(i^+j^.j^+k^ = 0+0+1+0 = 1)cosθ = A→.B→|A→||B→| = 12×2 = 12 ∴ θ = 600

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The angle between the vectors i^+j^ and (j^+k^) is

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