diff --git a/src/trigonometricFunctions.c b/src/trigonometricFunctions.c
new file mode 100644
index 0000000..0a9a956
--- /dev/null
+++ b/src/trigonometricFunctions.c
@@ -0,0 +1,25 @@
+
+#include "trigonometricFunctions.h"
+#include "math.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+double* calculate_sin_double(double angle) {
+    double* result= malloc(sizeof (double));
+    *result=sin(angle);
+    return result;
+}
+
+
+double* calculate_cos_double(double angle) {
+    double* result= malloc(sizeof (double));
+    *result=cos(angle);
+    return result;
+}
+
+
+double* calculate_tan_double(double angle) {
+    double* result= malloc(sizeof (double));
+    *result=tan(angle);
+    return result;
+}
diff --git a/src/trigonometricFunctions.h b/src/trigonometricFunctions.h
new file mode 100644
index 0000000..add1a8a
--- /dev/null
+++ b/src/trigonometricFunctions.h
@@ -0,0 +1,9 @@
+
+#ifndef THEADMIRALS_TRIGONOMETRICFUNCTIONS_H
+#define THEADMIRALS_TRIGONOMETRICFUNCTIONS_H
+
+double* calculate_sin_double(double angle);
+double* calculate_cos_double(double angle);
+double* calculate_tan_double(double angle);
+
+#endif //THEADMIRALS_TRIGONOMETRICFUNCTIONS_H