Brahmagupta interpolation formula

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In trigonometry, the Brahmagupta interpolation formula is a special case of the Newton-Stirling interpolation formula, which calculates the values of sine at different intervals. The formula was developed by Brahmagupta in 665, which was later expanded by Newton and Stirling around a thousand years later to develop the more general Newton-Stirling interpolation formula.

The Brahmagupta interpolation formula is defined as:

[r sin\theta = \frac [(frac + D_p}) + frac(frac - D_p})]]

 

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