### CLASS XII MATHS ANSWER KEY

### HAPPY BIRTHDAY TO GREATEST INDIAN MATHEMATICIAN -- SRINIVASA RAMANUJAN

The Indian mathematician Srinivasa Ramanujan Aiyangar (1887-1920) is best known for his work on hyper geometric series and continued fractions.

Srinivasa Ramanujan, born into a poor Brahmin family at Erode on Dec. 22, 1887, attended school in nearby Kumbakonam. By the time he was 13, he could solve unaided every problem in Loney's *Trigonometry ,*and at 14 he obtained the theorems for the sine and the cosine that had been anticipated by L. Euler.

Ramanujan became so absorbed in mathematics that when he entered the local government college in 1904 with a meritscholarship, he neglected his other subjects and lost the scholarship. Ramanujan married in 1909, and while working as a clerk he continued his mathematical investigations.

In January 1913 Ramanujan sent some of his work to G. H. Hardy, Cayley lecturer in mathematics at

far beyond, some of the latest conclusions of Western mathematicians.

In 1914 Ramanujan went to

In 1918 Ramanujan was elected a fellow of the Royal Society and a Fellow of Trinity College,

However, the story goes that , Ramanujan’s health deteriorated greatly while he was in