A small but important additionI know that for 2 vectors to be perpendicular their dot-product must equal zero
Hint: If ∣∣x+y∣∣=∣∣x−y∣∣ then (x+y)⋅(x+y)=(x−y)⋅(x−y).Hello. I’m stuck on this question (6). I know that for 2 vectors to be perpendicular their product must equal zero and the angle between them is 90 degrees. But how can I prove this without having values and only lengths? Can anyone help? Thanks ? View attachment 33176View attachment 33177