Simple Arduino library that speeds up trigonometry functions, based on work by Oscar Liang.
Simply drag the main folder into the libraries subdirectory of your Arduino IDE sketch folder.
This is a simple output (via serial) to show accuracy of library compared to the Arduino functions:
Sin 15:
- Standard [RAD]: 0.6503
- Fast [DEG]: 0.2588
Cos 15:
- Standard [RAD]: -0.7597
- Fast [DEG]: 0.9659
Acos .15:
- Standard [RAD]: 1.4202
- Fast [RAD]: 1.4230
Atan2 5, 5:
- Standard [RAD]: 0.7854
- Fast [RAD]: 0.7823
Also useful if you need degrees for sin/cos.