Cosine, Sine, and Tangent

[Fatstep]

How were these three values figured out, I've searched google and have not came up with anything revealing, thanks.

[Buffy]

Are you looking for a history of Trigonometry?

 

Here are a couple:

Simple

Not so Simple

 

Tangentially,

Buffy

[Fatstep]

I'm saying, who discovered/invented cosine/sine/tangent

 

Like in the 'Not so simple" link you posted it says this, "For a circle of unit radius the length of the chord subtended by the angle x was 2sin (x/2)," as part of the FIRST knownw trig fucntions, who said that angle x was 2sin.

Who said what sin was and determined why it is used etc.

 

I've read a lot about trig and calculus and have yet to come across how the three things above were calculated and by who. I also know

SomeOldHippyCaughtAnotherHippyTrippin'OnAcid, thanks.

[Buffy]

I don't think anyone has gotten farther than "The Greeks": answer is lost to time (there may have been a book in the Alexandria Library with someone's name on it, but it burned up).....unless I'm completely misunderstanding your question....

 

Author unknown,

Buffy

[Fatstep]

Alright, thank you.