#### Matt Benesi

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2) What is the exponential function called in relation to cosine and sine functions?

3) What are the other smooth, continual nested (or iterative) root functions (that are similar to sine and cosine) called in relation to their constants? (see: https://www.physicsforums.com/threads/generating-the-formula-for-the-coefficients-of-an-alternating-series.964892/ )

1* Are they called decomposition functions, since they decompose angles into ratios?