The development of Indian trigonometry , based on sine as against chord of the Greeks , a necessity for astronomical calculations with his own concise notation which expresses the full sine table in just one couplet for easy remembrance. One of the two methods suggested by him for the sine table is based on the property that the second order sine differences were proportional to sines themselves.
I will venture to assert, that a just translation of any ancient poet in rhyme is impossible. No human ingenuity can be equal to the task of closing every couplet with sounds homotonous, expressing at the same time the full sense, and only the full sense of his original.
william cowper