diff --git a/src/main/c/Calculator/calculator.c b/src/main/c/Calculator/calculator.c
index 6f0b2d2..2384f51 100644
--- a/src/main/c/Calculator/calculator.c
+++ b/src/main/c/Calculator/calculator.c
@@ -94,7 +94,12 @@ int main() {
                 result = sine(angle);
                 printf("Sine of %.2lf degrees: %lf\n", angle, result);
                 break;
-                
+                case 12:
+                printf("Enter angle in degrees: ");
+                scanf("%lf", &angle);
+                result = cosine(angle);
+                printf("Cosine of %.2lf degrees: %lf\n", angle, result);
+                break;
                 case :
                 printf("Exiting...\n");
                 break;