Varahamihira (505587) produced the Pancha Siddhanta (The Five Astronomical Canons). He made important contributions to trigonometry, including sine and cosine tables to 4 decimal places of accuracy and the following formulas relating sine and cosine functions:
Shridhara (c. 870930), who lived in Bengal, wrote the books titled Nav Shatika, Tri Shatika and Pati Ganita. He gave:
A good rule for finding the volume of a sphere.
The formula for solving quadratic equations.
The Pati Ganita is a work on arithmetic and mensuration. It deals with various operations, including:
Elementary operations
Extracting square and cube roots.
Fractions.
Eight rules given for operations involving zero.
Methods of summation of different arithmetic and geometric series, which were to become standard references in later works.
Manjula
Aryabhata's differential equations were elaborated in the 10th century by Manjula (also Munjala), who realised that the expression[72]
could be approximately expressed as
He understood the concept of differentiation after solving the differential equation that resulted from substituting this expression into Aryabhata's differential equation.
Aryabhata II
Aryabhata II (c. 9201000) wrote a commentary on Shridhara, and an astronomical treatise Maha-Siddhanta. The Maha-Siddhanta has 18 chapters, and discusses:
Numerical mathematics (Ank Ganit).
Algebra.
Solutions of indeterminate equations (kuttaka).
Bhaskara II
Bhāskara II (11141185) was a mathematician-astronomer who wrote a number of important treatises, namely the Siddhanta Shiromani, Lilavati, Bijaganita, Gola Addhaya, Griha Ganitam and Karan Kautoohal. A number of his contributions were later transmitted to the Middle East and Europe. His contributions include:
Arithmetic:
Interest computation
Arithmetical and geometrical progressions
Plane geometry
Solid geometry
The shadow of the gnomon
Solutions of combinations
Gave a proof for division by zero being infinity.
Algebra:
The recognition of a positive number having two square roots.
Surds.
Operations with products of several unknowns.
The solutions of:
Quadratic equations.
Cubic equations.
Quartic equations.
Equations with more than one unknown.
Quadratic equations with more than one unknown.
The general form of Pell's equation using the chakravala method.
The general indeterminate quadratic equation using the chakravala method.
Indeterminate cubic equations.
Indeterminate quartic equations.
Indeterminate higher-order polynomial equations.
Geometry:
Gave a proof of the Pythagorean theorem.
Calculus:
Conceived of differential calculus.
Discovered the derivative.
Discovered the differential coefficient.
Developed differentiation.
Stated Rolle's theorem, a special case of the mean value theorem (one of the most important theorems of calculus and analysis).
Derived the differential of the sine function.
Computed π, correct to five decimal places.
Calculated the length of the Earth's revolution around the Sun to 9 decimal places.
Trigonometry:
Developments of spherical trigonometry
The trigonometric formulas: