[SOLVED] Determine equation based on dataset
I am currently working on something for my personal site. Most things I can figure out myself, but I'm having trouble with this problem.
I need to determine an equation that's based on the following dataset:
Alternatively, it can be expressed as (in radians):
Now what I'm trying to do is find the equation these numbers represent.
Let's say I know y=3. How can I determine x based on the information above? I see a pattern, but I'm unable to come up with a working equation.
I am able to test to see if a pair of values is correct.