Proof that the angle between vectors is the inverse cosine (arccos) of the Dot Product of the the two vectors normalized. (Dot Product and Vector Projections Part 2/9)

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Introduction to ecosystems and biomes. Watch the next lesson: https://www.khanacademy.org/science/biology/ecology/intro-to-ecosystems/v/flow-of-energy-and-matter-through-ecosystems Missed the previous lesson? Watch here: https://www.khanacademy.org/science/biology/ecology/community-structure-and-diversity/v/ecological-succession Ecology on Khan Academy: Why are polar bears found only in the Arctic? Why does mildew grow in your shower and not (hopefully) in your sock drawer? Learn how ecologists study the interactions between organisms and their environment,…

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Generally a cycle takes more time then a car to travel a certain distance. This is due to the difference in their speeds. If the speed decreases, the time taken to travel the distance increases. If the speed increases, the time taken to travel the distance decreases. The distance travelled is denoted by ‘d’ speed…

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