What is the value of i dot j?

A. 0

Step 1: Identify the concept: this is dot product of perpendicular unit vectors. Step 2: i and j are perpendicular and cos 90 degree = 0 so i dot j = 0. Step 3: Remember dot product of perpendicular vectors is zero.

Step 1: concept पहचानें: यह perpendicular unit vectors का dot product है। Step 2: i और j perpendicular हैं और cos 90 degree = 0 होता है इसलिए i dot j = 0। Step 3: Perpendicular vectors का dot product zero याद रखें।