Question

Evaluate \[\hat{i}\times\hat{k}\].

Options

• \[\hat{i}\]

• \[-\hat{j}\]

• \[-\hat{k}\]

• \[\hat{j}\]

Answer 1

Since \[\hat{k}\times\hat{i}=\hat{j}\], reversing the vector order changes the sign. Thus \[\hat{i}\times\hat{k}=-\hat{j}\].