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So far, when Iamp;#39;ve told you about the dot and the cross products, Iamp;#39;ve given you the definition as the magnitude times either the cosine or the sine of the angle between them. But what if youamp;#39;re not given the vectors visually? And what if youamp;#39;re not given the angle between them? How do you calculate the dot and the cross products? Well, let me give you the definition that I giving you already. So letamp;#39;s say I have a dot b dot product. Thatamp;#39;s the magnitude of a times the magnitude of b times cosine of the angle between them. a cross b is equal to the magnitude of a times the magnitude of b times sine of the angle between them-- so the perpendicular projections of them-- times the normal vector thatamp;#39;s perpendicular to both of them. The normal unit vector, and you figure out which of the two perpendicular vectors it is by using the right hand rule. But what if we donamp;#39;t have the thetas; the angles between them? What if, for exam