What is the dot product of and ?
Answer and explanation
Correct answer: A. 24
- Step 1: The inner product of vectors and is .
- Step 2: Multiply corresponding unit vector coefficients from and .
- Step 3: Summing the components yields .
Answer
24.
Why not the others: -24 reverses the sign of the scalar dot product; 15 is an underestimation arithmetic miscalculation; 28 is an overestimation arithmetic miscalculation.
Practise more Vectors.
Free questions with an explanation for every one, and full timed JEE Main mock tests.