diff --git a/src/main/c/Calculator/calculator.c b/src/main/c/Calculator/calculator.c
index 2cc9319..6f0b2d2 100644
--- a/src/main/c/Calculator/calculator.c
+++ b/src/main/c/Calculator/calculator.c
@@ -88,6 +88,13 @@ int main() {
                 result = square(num1);
                 printf("Result: %lf\n", result);
                 break;
+                case 11:
+                printf("Enter angle in degrees: ");
+                scanf("%lf", &angle);
+                result = sine(angle);
+                printf("Sine of %.2lf degrees: %lf\n", angle, result);
+                break;
+                
                 case :
                 printf("Exiting...\n");
                 break;