Several great mathematicians have made contributions to trigonometry. Pitiscus wrote books on plane and spherical trigonometry, and Hipparchus produced a table of chords.
they were the best fathers in the world.
There is no Contribution of Thales in the field of trignometry.........
he made trigonometry
The contributions of Arab scholars was trigonometry. They also contributed other thing such as their intelligence . :D :)
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Centuries ago, Islam created the mathematics of 'Trigonometry'.
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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Trig is present day math but maybe you mean calculus. its a huge part of calculus.