gaokao 2015 Q6

gaokao · China · beijing-arts 5 marks Vectors Introduction & 2D Perpendicularity or Parallel Condition

Let $a, b$ be non-zero vectors. ``$a \cdot b = | a | | b |$'' is ``$a \parallel b$'' a

Let $a, b$ be non-zero vectors. ``$a \cdot b = | a | | b |$'' is ``$a \parallel b$'' a