Question

Find the value of \( (k \times j) \cdot i \).

• A. 1
• B. -1
• C. 0
• D. 2i

Hint:

The dot product of any vector with itself is zero if they are perpendicular, which is the case for \( k \) and \( j \).

Answer 1

The Correct Option is C

The cross product \( k \times j = i \). Therefore, we need to compute the dot product of \( i \) with itself: \[ (k \times j) \cdot i = i \cdot i = 0. \] Thus, the answer is 0.