…showed first 75 words of 635 total…

…showed last 75 words of 635 total…what we now call modern trigonometry. Even though, most of his findings could not be confirmed of denied till the time of Sir Isaac Newton, when it became possible to test effects of rotation of the Earth. And some of his findings were off due to poor instruments, he was still a man of knowledge and brought to our attention that the earth revolves on its axis and that the earth revolves around the sun.