Create README.md

Author: JorjMcKie

recipes/Python/Draw Sine Function in PDF/README.md

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+Created on 2017-08-17
+
+@author: (c) 2017, Jorj X. McKie
+
+License: GNU GPL V3
+
+PyMuPDF Demo Program
+---------------------
+Create a PDF with drawings of the sine and cosine functions using PyMuPDF.
+Depending on how start and end points are located with respect to each
+other, horizontal or vertical drawings result.
+The vertical case can obviously be used for creating inverse function
+(arcus sine / cosine) graphs.
+
+The function graphs are pieced together in 90 degree parts, for which Bezier
+curves are used.
+
+Note that the 'alfa' and 'beta' constants represent values for use as 
+Bezier control points like so:
+x-values (written in degrees): [0, 30, 60, 90]
+corresponding y-values:        [0, alfa, beta, 1]
+
+These values have been calculated by the `scipy.interpolate.splrep()` method.
+They provide an excellent spline approximation of the sine / cosine
+functions - please look at SciPy documentation for background.
+