Add cordic links to resources page

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@@ -54,6 +54,12 @@ for comparative/informative purposes with regard to Simple-V.
 * [Fast Floating Point Square Root](https://pdfs.semanticscholar.org/5060/4e9aff0e37089c4ab9a376c3f35761ffe28b.pdf)
 * [Reciprocal Square Root Algorithm](http://www.acsel-lab.com/arithmetic/arith15/papers/ARITH15_Takagi.pdf)
 
+## CORDIC and related algorithms
+* [BKM (log(x) and e^x)](https://en.wikipedia.org/wiki/BKM_algorithm)
+* [CORDIC](http://www.andraka.com/files/crdcsrvy.pdf)
+ - Does not have an easy way of computing tan(x)
+* [zipcpu CORDIC](https://zipcpu.com/dsp/2017/08/30/cordic.html)
+
 ## IEEE Standard for Floating-Point Arithmetic (IEEE 754)
 
 Almost all modern computers follow the IEEE Floating-Point Standard. Of