lecture2

lecture2 - Lecture 2: Dot Products and Cross Products May...

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Unformatted text preview: Lecture 2: Dot Products and Cross Products May 6, 2009 Lecture 2: Dot Products and Cross Products Objectives Dot product concepts 1 Compute dot products 2 Compute angles between vectors 3 Compute projections of vectors Cross product concepts 1 Compute cross products 2 Learn the direction of cross products 3 Compute triple scalar products Lecture 2: Dot Products and Cross Products Dot products a b = a 1 b 1 + a 2 b 2 + a 3 b 3 Lecture 2: Dot Products and Cross Products Dot products a b = a 1 b 1 + a 2 b 2 + a 3 b 3 a b is a scalar. Lecture 2: Dot Products and Cross Products Dot products a b = a 1 b 1 + a 2 b 2 + a 3 b 3 a b is a scalar. Properties of the dot product 1 a a = | a | 2 2 a ( b + c ) = a b + a c 3 a b = b a 4 a = 0 5 ( c a ) b = c ( a b ) Lecture 2: Dot Products and Cross Products Dot product is related to angle between the vectors Lecture 2: Dot Products and Cross Products Dot product is related to angle between the vectors a b = | a || b | cos Lecture 2: Dot Products and Cross Products Dot product is related to angle between the vectors a b = | a || b | cos cos = a b | a || b | Lecture 2: Dot Products and Cross Products Dot product is related to angle between the vectors...
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lecture2 - Lecture 2: Dot Products and Cross Products May...

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