FADD

FPU.ACOS(); // A = acos(A) radians

example 1:

#include<LCD4_128.h>
#include<FPU_128.h>

void main()
{

   float a;
   float b;

   Init_Fpu();    // Initialize FPU
   Lcd_init();     // Initialize LCD

   a = 0.95;
   FPU.FWRITEA(1,a);

   FPU.ACOS();

   a = FPU.FREAD(1);

LCD.PRINT(a);

}

//result : will print 0.31756077