No one in particular because trigonometry has evolved over thousands of years with many ancient and modern mathematicians making their own discoveries and contributions to the subject.
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hipparchus
Budhayana
the founder thinks that how to relate the perpendicular triangle's sides.so that in that way he found the trigonometry.
plane trigonometry spherical trigonometry
The main kinds are plane trigonometry and solid trigonometry. The latter will include trigonometry in hyper-spaces.