Brahmagupta was one of the famous Indian mathematicians and astronomers. He was the first mathematician who described Zero and Negative Numbers. He wrote two leading books on mathematics and astronomy in the Sanskrit language: ‘ led ‘Brahmasphutasiddhanta’ and ‘Khandakhadyaka’. Such a great Mathematician was born in 598 CE in Bhinmal, the Indian state of Rajasthan. King Vyaghramukha was the ruler of Bhinmal and made Brahmagupta the head of the astronomical observatory in Ujjain. In those days, Ujjain was the destination for all mathematicians and astronomers.
Primarily, the ‘Brahmasphutasiddanta’ discussed the loopholes of his contemporary mathematician’s theories. This book has 24 chapters and 1008 Sanskrit Verses. This book also discussed the mathematical chapters of geometry, trigonometry, algebra and algorithmics. At age 67, he wrote another book, ‘Khanda-Khadyaka’, discussing astronomy.
Brahmagupta’s Contributions to Mathematics
He contributed much to mathematics and still uses his theories to solve mathematical problems. In his book, ‘Brahmasphutasiddhanta’ discussed the negative and positive numbers and their multiplications. He also discovered ‘A positive number multiplied by a negative number is negative’, ‘A negative number multiplied by a negative number is positive’ and other two principles of these positive and negative multiplications. He also explained the ‘geometrical’ theories, similar to the ‘Pythagorean Theorem’. He also introduced the principles and rules of trigonometry and brought a guide to knowing the area of a triangle. He widely discussed the concept of negative numbers. He found the value of ‘Pi’ and introduced the formula of cyclic quadrilaterals.
Brahmagupta’s Contribution to Science and Astronomy
The developed western countries decided that the Earth and the Universe were round. However, Brahmagupta argues that the Universe and Earth were in the form of ‘flat’. He also predicted the positions of the planets in the universe. He brought the perfect timing for the forming of lunar and solar eclipses. At present, knowing those things are straightforward, but in those days, without any instruments knowing the Universal facts was very difficult. He was the first scientist to calculate the length of a solar year is close to the present calculation of the solar year. The flowing of the water in the river made him predict the gravity but not indeed estimate it.