Question 16
VectorsIf x = i − 3j and y = 6i + j, calculate the angle between x and y.
- A.60°
- B.75°
- C.81°
- D.85°
Show the answer and explanation
Answer: C (81°)
Explanation
x·y = 6 − 3 = 3; |x| = √10, |y| = √37. cos θ = 3/√370 ≈ 0.156, θ ≈ 81°.
If x = i − 3j and y = 6i + j, calculate the angle between x and y.
Answer: C (81°)
x·y = 6 − 3 = 3; |x| = √10, |y| = √37. cos θ = 3/√370 ≈ 0.156, θ ≈ 81°.