initial

1 files changed, 62 insertions, 0 deletions

diff --git a/libk/src/math/trig.c b/libk/src/math/trig.c
new file mode 100644
index 0000000..f234d69
--- /dev/null
+++ b/libk/src/math/trig.c
@@ -0,0 +1,62 @@
+#include <math.h>
+
+double sin(double r) {
+    r = fmod(r + PI, PI * 2) - PI;
+    double d = r;
+    float mult = -1;
+    for (int i = 3; i < 11; i+= 2, mult = -mult) {
+         d += (pow(r, i)/fact(i)) * mult;
+    }
+    return d;
+}
+
+double cos(double r) {
+    r = fmod(r + PI, PI * 2) - PI;
+    double d = 1;
+    float mult = -1;
+    for (int i = 2; i < 10; i+= 2, mult = -mult) {
+         d += (pow(r, i)/fact(i)) * mult;
+    }
+    return d;
+}
+
+double tan(double r) {
+    return sin(r) / cos(r);
+}
+
+double csc(double r) {
+    return 1 / sin(r);
+}
+
+double sec(double r) {
+    return 1 / cos(r);
+}
+
+double cot(double r) {
+    return cos(r) / sin(r);
+}
+
+double sinh(double r) {
+    return (pow(E, r) - pow(E, -r)) / 2;
+}
+
+double cosh(double r) {
+    return (pow(E, r) + pow(E, -r)) / 2;
+}
+
+double tanh(double r) {
+    return sinh(r) / cosh(r);
+}
+
+double csch(double r) {
+    return 1 / sinh(r);
+}
+
+double sech(double r) {
+    return 1 / cosh(r);
+}
+
+double coth(double r) {
+    return cosh(r) / sinh(r);
+}
+