MHT CET202015 Oct 2020Morning ShiftPhysicsMathematics in PhysicsActual
For any two vectors A and B if A B =| A B | , the magnitude of ( A + B ) is ( 4 =1, 4 = 1 2 )
Options
- AA²+B²+ 2 A B
- BA²+B²+ A B 2
- CA+B
- DA²+B²
Correct answer
A. A²+B²+ 2 A B
Step-by-step solution
From the given condition, AB = AB So, =45^ Magnitude of A + B will be, | A + B |= A ²+ B ²+2 AB 45^ = A²+B²+2 A B 1 2 = A²+B²+ 2 A B