Question

the angle between the vector î+j and j + k is ​

Answer 1

Answer:

Let angle between ( i + j ) and ( j + k )

cos∅ = ( i + j ).( j + k )/|i + j| .| j + k |

|i + j | = √(1² + 1² ) = √2

|j + k | = √(1² + 1²) = √2

cos∅ = 1/√2.√2

= 1/2

cos∅ = cos60°

∅ = 60°

Explanation:

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