diff --git a/src/c/funktionen.c b/src/c/funktionen.c
index 49c9fa5..1908340 100644
--- a/src/c/funktionen.c
+++ b/src/c/funktionen.c
@@ -93,4 +93,15 @@ float cosine(float x) {
 // Function to calculate the tangent of an angle in radians
 float tangent(float x) {
 	return tan(x);
-}
\ No newline at end of file
+}
+
+// Function to calculate the arc sine of a value and return the result in radians
+float arcSine(float x) {
+	if (x >= -1 && x <= 1) {
+		return asin(x);
+	}
+	else {
+		printf("Error: Invalid input for arc sine!\n");
+		return 0;
+	}
+}