CUET Preparation Today
CUET
-- Mathematics - Section B1
Vectors
A = 2i + j + 2k
B = 2i - 3j + k
Find the dot projection of A and B.
1
2
3
5
$\vec A.\vec B=(2\hat i+\hat j+2\hat k).(2\hat i-3\hat j+\hat k)$
$=2×2-3×1+2×1$
$=4-3+2$
$=3$
