https://github.com/RobTillaart/FastTrig/blob/master/FastTrig.cpp https://github.com/RobTillaart/FastTrig/blob/master/FastTrig... If absolute precision is not r

https://github.com/RobTillaart/FastTrig/blob/master/FastTrig.cpp https://github.com/RobTillaart/FastTrig/blob/master/FastTrig... If absolute precision is not required, there is many ways to compute cosinus !