the value of λ . . If are mutually perpendicular vectors of equal magnitudes, show that the vector is equally inclined to . Prove that , if and only if are perpendicular, given Choose the correct answer in Exercises to .
. If θ is the angle between two vectors , then only when (A) π < θ < (B) π ≤θ ≤ (C) < θ < π (D) ≤ θ ≤ π . Let be two unit vectors and θ is the angle between them. Then is a unit vector if (A) π θ = (B) π θ = (C) π θ = (D) π θ = .
The value of ˆ ˆ .( is (A) (B) – (C) (D) . If θ is the angle between any two vectors , then when θ is equal to (A) (B) π (C) π (D) π Summary