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Vectors and matrices — Question 2

QCAA 2025, Paper 2 · 1 mark

Q2 · 2025 · Technology-activeSimple familiar1 mark

QUESTION 2

Which unit vector product is correct?
(A)
i^×i^=−1\hat{\mathbf i}\times\hat{\mathbf i}=-1
(B)
i^×k^=0\hat{\mathbf i}\times\hat{\mathbf k}=0
(C)
j^×i^=k^\hat{\mathbf j}\times\hat{\mathbf i}=\hat{\mathbf k}
(D)
j^×k^=i^\hat{\mathbf j}\times\hat{\mathbf k}=\hat{\mathbf i}
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