auravulpes/FENIX_libc
1
0
Fork 0
Code Issues 2 Pull requests Projects Releases Wiki Activity

Degree 16, final answer

Browse source
This commit is contained in:
Kat R. 2022-10-09 12:13:17 -05:00
parent c73b94f5f9
commit d9b8e481aa
1 changed files with 4 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
math/cos.c
View file

@ -16,7 +16,7 @@
double cos(double x) { double cos(double x) {
double pi = M_PI; /* Really, me?! -Kat */ double pi = M_PI; /* Really, me?! -Kat */
int temp; int temp;
double deg_2, deg_4, deg_6, deg_8, deg_10, deg_12; double deg_2, deg_4, deg_6, deg_8, deg_10, deg_12, deg_14, deg_16;
double cosine; double cosine;
if(x < 0) x = -x; if(x < 0) x = -x;
@ -44,6 +44,8 @@ double cos(double x) {
deg_8 = deg_6 * deg_2 * 2 / (8 * 7); deg_8 = deg_6 * deg_2 * 2 / (8 * 7);
deg_10 = deg_8 * deg_2 * 2 / (10 * 9); deg_10 = deg_8 * deg_2 * 2 / (10 * 9);
deg_12 = deg_10 * deg_2 * 2 / (12 * 11); deg_12 = deg_10 * deg_2 * 2 / (12 * 11);
deg_14 = deg_12 * deg_2 * 2 / (14 * 13);
deg_16 = deg_14 * deg_2 * 2 / (16 * 15);
/* /*
In case you aren't familiar with the theory of a Taylor In case you aren't familiar with the theory of a Taylor
@ -75,7 +77,7 @@ double cos(double x) {
even function, we don't need any terms less than 0, so even function, we don't need any terms less than 0, so
why *center* at zero and include negatives? why *center* at zero and include negatives?
*/ */
cosine = -1 + deg_2 - deg_4 + deg_6 - deg_8 + deg_10 - deg_12; cosine = -1 + deg_2 - deg_4 + deg_6 - deg_8 + deg_10 - deg_12 + deg_14 - deg_16;
return cosine; return cosine;
} }