The Middle East, in what is now Iran. That is where the Persians lived.
At different times they were more and also less civilised than the Greeks.
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There is no one or two or a few 'fathers of trigonometry.' Ancient Sumarians, Babalonians started using ratios of sides of triangles. The Greeks continued the study, but emphasized geometric methods instead of algebraic methods that used in trig. Egyptians, Persians, Arabic, and Indians all contributed to the development of trig. This whole process took about 2000 years, maybe more.
less is < and more is > 1<2 2>1
the ancient greeks, the system was probably designed by more than one person
The answer is less.
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