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okay hello everyone we want to look at how to show that the relationship here does not product of two vectors how do we show that this formula is true so to prove this all we need to do is uh you know to find two vectors that have an angle an angle theta so letamp;#39;s call this vector u and letamp;#39;s call this vector v okay so if this is true you recall that the addition of these two vectors is going to be the vector moving from one end to the other okay so if this is u and this is v then it means that the addition of these two is simply going to be you remember that this is supposed to go this is the direction of this so this is supposed to go from this direction and then continues to this thatamp;#39;s what we said about resultant of it as addition of two vectors this has to start from here to this end and then continue for it to add up to this so assuming we call here w and now this vector that will now move in opposite direction of u is going to be minus u so what it means