MHT CET2019Morning ShiftPhysicsMathematics in PhysicsActual
The vectors (A + B) and (A – B) are at right angles to each other. This is possible under the condition
Options
- AA = B
- BA . B = 0
- CA . B = 1
- DA × B = 0
Correct answer
A. A = B
Step-by-step solution
Vectors (A + B ) and (A – B) are at right angle to each other, therefore A + B . A - B = 0 A . A + B . A - A . B - B . B = 0 A + B A c o s θ - A B c o s θ - B 2 = 0 A 2 = B 2 Hence, A = B