NEET2005PhysicsMathematics in PhysicsActual
If a vector 2 i +3 j +8 k is perpendicular to the vector 4 j -4 i + k then the value of is:
Options
- A1 2
- B- 1 2
- C1
- D-1
Correct answer
B. - 1 2
Step-by-step solution
a =2 i +3 i +8 k , b=4 j +3 i + k aligned & a b =0, if a⁻¹ b⁻¹ & (2 i +3 j +8 k ) (-4 i+4 j+ k)= 1 2 & =- 1 2 aligned