Origin of the Tangent Function Part 2

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This tutorial presents a deeper understanding of where the tangent function found its origins. The tangent function came about because the ancients (probably in Greece or Egypt) realized a useful feature of similar right triangles: that the ratios of corresponding sides are equal to one another.
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This series merits way more viewer than this. This is what I was asking for for many years! Thank you so much!

Yasharvl
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Thank you so much for this series. This has been incredibly helpful

SidneyIam
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what brand of calculator is that? i've never seen one so oblong before

no-lifenoah
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so, when finding the opposite, tan is useful when you have the adjacent, while sin is useful when you have the hypotenuse value..

darsutube
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tan(60)x11.55=20.005 not 20.02, right??? need reply pls. thanks

edyodico
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The thing i don't like is that you are not using radians. The proper introduction to trigonometry should first define what a radian is.

Simon-xitb