What is the dot product of and ?
Answer and explanation
Correct answer: B. -11
- Step 1: Recall the definition of the vector dot product: .
- Step 2: Calculate each component product for and .
- Step 3: Combining the terms produces .
Answer
-11.
Why not the others: -7 is an overestimation arithmetic miscalculation; -2 is an overestimation arithmetic miscalculation; 11 reverses the sign of the scalar dot product.
Practise more Vectors.
Free questions with an explanation for every one, and full timed JEE Main mock tests.