Answer
$0$
Work Step by Step
The dot product of two perpendicular vectors is $0$.
Thus, we obtain:
$\hat{i} \cdot \hat{k}=0$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.