diff --git a/src/trig_functions/trig_functions.c b/src/trig_functions/trig_functions.c
index 8eec384..ffae719 100644
--- a/src/trig_functions/trig_functions.c
+++ b/src/trig_functions/trig_functions.c
@@ -2,7 +2,8 @@
 #include <math.h>
 
 double calculate_sin(double angle) {
-    return sin(angle);
+    if (angle==0) return 0;
+    else return sin(angle);
 }
 
 double calculate_cos(double angle) {