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Why sin and cos don't mean anything


Why sin and cos don't mean anything

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An excellent summary of this story (found after I did all the research, annoyingly!) can be found here:

So, yes, the title is, rather than trigonometric, slightly hyperbolic. Sin and cos are a corruption of the word sinus, and so do have a lexical root and broader meaning. But the point I'm trying to make here is that there is no connection between the word sinus and what the functions actually correspond to. Any true meaning was lost in the successive translations and transliterations from sanskrit. So while sin and cos do have /a/ meaning, I guess what I'm saying is that they don't have a /meaningful/ meaning.

Also I apologise for any pronunciation mistakes in this. I'm a scientist, not a linguist! Also also yes I'm aware that there are differences between Persian (in various stages) and Arabic.

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To know more about the different functions in Trigonometry, please visit .

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Trigonometry - The graphs of sin and cos

Being able to visualize the trigonometric functions is important. This video will get you up to speed by showing you the basic graph for sine and cosine. You want to memorize key values such as its maximum and minimum, as well as where it goes through the x-axis. This will make graphing transformed functions easier. For more video please visit

Origin of Trigonometry | Sin Cos Tan

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What is the meaning of Sin or Cos theta?

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The 3rd-century astronomers first noted that the lengths of the sides of a right-angle triangle and the angles between those sides have fixed relationships: that is, if at least the length of one side and the value of one angle is known, then all other angles and lengths can be determined algorithmically. These calculations soon came to be defined as the trigonometric functions and today are pervasive in both pure and applied mathematics: fundamental methods of analysis such as the Fourier transform, for example, or the wave equation, use trigonometric functions to understand cyclical phenomena across many applications in fields as diverse as physics, mechanical and electrical engineering, music and acoustics, astronomy, ecology, and biology. Trigonometry is also the foundation of surveying. Check out Ebook Mind Math from Dr. Garg

What do we use sin(x), cos(x) and tan(x) for?

Why do we care about sine, cosine and tangent? What are they for? Even if you've learned that sine is opposite over hypotenuse, why would anyone care what opposite over hypotenuse equals? In this video, we quickly and easily explain why sine, cosine and tangent are useful!

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Have you ever been told that sin^2(x)+cos^2(x)=1? Did your teacher explain why that's true? In this video we'll show why sine squared plus cosine squared must equal one!





How do Computers Calculate Sin, Cos and Tan?

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What is sin, cos, tan?

If you have a scientific calculator, you likely will see sin, cos and tan. What do they mean? These are trigonometric functions sine, cosine and tangent. They are ratios pertaining to sides of a right triangle. Examples are shown using the ratios to calculate sine, cosine and tangent of an angle.
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Calculus - Derivative of sin and cos

This video will give you the first two basic trigonometric derivatives. These are the derivatives of sine and cosine. Watch early on how these two derivatives actually connect to one another by taking derivatives. For more videos please visit

Trigonometry – Graphing SIN and COS

President Barack ObaMATH is back for an eye-opening lesson on graphing trigonometric functions! Specifically, we're graphing sin and cos, within one period, which is 2π. If you don't understand that now, you definitely will at the end of the video. That's because the Commander-in-TEACH uses the Unit Circle to calculate all the sin and cos values necessary, which is a great review for any algebra or calculus class. Great energy in the Oval Office today, YAY MATH!

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Trigonometric Integrals --- ∫sin^n(x)cos^m(x)dx via Pythagorean or Half-Angle Identities

Trigonometric Integrals are just integrals with lots of trig terms in them. We have a ton of different trig identities to choose from to try and convert these into a simpler form that we can use a u-sub on. With a bit of foresight we can choose a strategy to use identities such as the pythagorean or half-angle identities to reduce these types of integrals. Sin(x) & Cos(x) work well together, as do Tan(x) & Sec(x), as do Cot(x) & Csc(x).

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This video was created by Dr. Trefor Bazett, an Assistant Professor, Educator at the University of Cincinnati. #calculus #math

How Sin Works


Limit of (1 - tan x)/(sin x - cos x) ❖ Calculus 1 ❖ Trig Limits

This video works out the limit of (1 - tan x)/(sin x - cos x). This type of limit is typically found in a Calculus 1 class.

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Other Graphs - Sin Cos Tan Exponential | Graphs | Maths | FuseSchool

You should already know what a straight line, quadratic, cubic and reciprocal look like when plotted on a graph.

In this video we will discover what the sin, cos and tan graphs look like and also exponential functions.

You don't necessarily need to know the exact values that these functions cross through, but you should at least recognise their different shapes. The sine and cosine graphs are very similar; they are repeating curves that look like a snake!! The tangent graph is very different, it looks like lots of separate parts. The exponential graph increases rapidly, getting steeper and steeper as it goes. Make sure you recognise these different graph shapes.

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derivative Find Dxy of y = sin^2(x) + cos^2(x)

derivative Find Dxy of y = sin^2(x) + cos^2(x)

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జన్మపాప౦- 7, హీబ్రూ భాషలో హ్రుదయ౦ అనగా ఏమి?

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