Origin of Trigonometry

Ever wondered where trigonometry came from? Find out its interesting history dating back to Ancient Egypt!
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This video was made in association with The Math Centre at Humber College, by Derek Taylor.
Producer - Cameron Redsell-Montgomerie

[davidswift]

Now I know why I was put off maths at school. The teacher starts off simply and then leaps ahead using language that assumes you suddenly know the basics they do. Good teachers make sure that you understand one concept before building on it to the next.

[Tony-jsos]

Imagine them calculating cos sin tan without calculators 😍

[___________]

I'm really sorry but I understood absolutely nothing and the explanation was so robotic and bad. Please talk more naturally, consistently and slowly.

I understand that you're trying to spread math like this but a short minute video on the origins of trigonometry will result in nobody understanding and your time wasted on editing, etc. However thanks for the effort

[markondapatnaikpatnaik]

In 500AD Aryabhatta of India used Sine firstly as Ardhajya for half chord, Which shorted to jya or jiva in due course. Then after The book Aryabhatiam translated into Arabic, then after Latin, then after Greek and English.
English Prof. Edmund Gunter abbreviated notation Sin.

[yohendryy]

Bro skiped how was invented and just said the etimologhy

[अंशुमानअवस्थी]

wow, absolutely 0 mention of indian contributions, starting from the concept of "chapa"...typical ...and yh almost forgot, everything, in this entire world, was done by greeks...

[anonymous]

Great concepts but the video moves too quickly. It would help if you explain the functions of cos and sin better and more slowly

[aayushkumar]

Trigonometry was originated in dholavira... Dholavira is part of Indus valley civilization...
Sine function was also discovered by Indians...mathematicians

[LSMaths]

Very Great Please name the software used

[Icecream-xsjk]

I'm dumb, why did they draw a circle around it?

[samuell]

This video covers much ground and I had to go through it slowly...plus I had to review trig identities to find sin theta over two and work backwards to the one minus cos theta term

[adriarubiocoll]

Downvoted because you didn't share your sources, nor did you hint at the royal misstranslation that is the latin "sinus" (meaning bosom), which comes all the way from the Sanskrit "jyā", which literally means "bow-string".

According to Hindu Trigonometry, by Bibhutibhushan Datta, the Sanskrit "jyā" was adopted by Arabic speakers and pronounced as "jiba". With time, it evolved into "jaib", and Latin translators subsequently confused it for a native Arabic word of similar phonetism which meant "bosom", or "bay".


Sources:
- "Hindu Trigonometry", by Bibhutibhushan Datta. Indian Journal of History of Science.

[surya_]

It was discovered by a indian mathmatician "arayabhatta

[vedantbidwe]

This is so messed up. The video is absolutely wrong! The dimmest mathematician would use trigonometry to build pyramids. Allow me to point out all the flaws in this video:
1.) Sources state that the Greeks or the Babylonians invented trig, NOT the Eygptains.
2.) You don't even need trig to find the slant height, just use PT with half the base and height
3.) For the Eyptains to use Pythagorean theorem, Pythagorus would have had to invent it first! Egyptains started building pyramids in 2500 BCE, while Pythagorus was born in 570 BCE!
4.) Unless the base and the height are equal, the circle can't touch both of the vertices.
5.) If lets assume the base and the height are equal, then the sides can't be equal. Which means the pyramid would look as if it were tipped over!

[DerGeigerVetrin]

Bro this guy I am so confused now. Who created it then can someone please reply and like if you have a video please? Thanks in advance

[vendettamalize]

2 sin ² (Θ/2) how come my answer is this??? can someone enlighten me???

[cuckmaker]

No videos in a while, is this channel done with? I really liked it

[johnosullivan-nqwd]

you explained the ”what“ but not the how or why behind what you showed. No mention of tangent or the nature of right angle triangles. Therefore I cant say this is a good maths video.

[bzashadows]

i think i need to go watch a 10 min video

[meaninglessname]

Nobody ever pronounces cosine as "cose", not even if they are reading an equation off the board.