The Radian

If you've had any sort of education, you probably know that angles are measured in degrees. If you don't, then i highly suggest you re-consider your life choices.

To use these trigonometric functions in an actually good way that won't make mathematicians and engineers cope, seethe and mald, we'll convert these degrees into this other unit, called The Radian.

The radian is denoted by And it has a value of The story behind the radian is basically, a few centuries ago some mathematicians were trying to make arcs and angles of a circle make sense but things didn't fit together so they found that a 180 degree arc isn't exactly 3 radians but 3.14, hence the reason pi exists!

You may convert from n degrees to r radians:
You may also convert from r radians to n degrees: That's pretty much it for this part.
Let's get into deeper concepts now.

The Fundamentals of The Sine and Cosine