An iterative method for computing $\pi$ by argument reduction of the tangent function
In this work, we develop a new iterative method for computing digits of $\pi$ by argument reduction of the tangent function. This method combines a modified version of the iterative formula for $\pi$ with squared convergence that we found in our previous work and a leading arctangent term from the Machin-like formula. The computational test we performed shows that algorithmic implementation can provide more than $17$ digits of $\pi$ per increment. Mathematica codes, showing the convergence rate in computing digits of $\pi$, are presented.