ABL electronic PIC Microcontrollers PIC16 - Manual (Page 311)

mikroC implements fundamental trigonometry functions. These functions are
implemented as lookup tables, and return the result as integer, multiplied by 1000
and rounded up.
SinE3
CosE3
MikroElektronika: Development tools - Books - Compilers
303
page
mikroC - C Compiler for Microchip PIC microcontrollers
mikroC
making it simple...
Trigonometry Library
Library Routines
Prototype int SinE3(unsigned angle_deg);
Returns Function returns the sine of input parameter, multiplied by 1000 (1E3) and rounded up
to the nearest integer. The range of return values is from -1000 to 1000.
Description Function takes parameter
angle_deg
which represents angle in degrees, and returns its
sine multiplied by 1000 and rounded up to the nearest integer. The function is imple-
mented as a lookup table; maximum error obtained is ±1.
Example res = SinE3(45); // result is 707
SinE3
Prototype int CosE3(unsigned angle_deg);
Returns Function returns the cosine of input parameter, multiplied by 1000 (1E3) and rounded
up to the nearest integer. The range of return values is from -1000 to 1000.
Description Function takes parameter
angle_deg
which represents angle in degrees, and returns its
cosine multiplied by 1000 and rounded up to the nearest integer. The function is imple-
mented as a lookup table; maximum error obtained is ±1.
Example res = CosE3(196); // result is -193
CosE3