The dot product of two perpendicular vectors is: A 1 B 0 C The magnitude product D Undefined ✓ Correct Answer: Option B A·B = |A||B|cos(θ). If θ = 90°, cos(90°) = 0, so A·B = 0. Used to test orthogonality. Practice FE Exam Prep Quizzes → Browse All Questions Study Flashcards