diff --git a/sk2/calculator.c b/sk2/calculator.c
index 6565aef..e8c9b37 100644
--- a/sk2/calculator.c
+++ b/sk2/calculator.c
@@ -26,13 +26,13 @@ double odcitaj(double a, double b) { return a - b; }
 double nasob(double a, double b) { return a * b; }
 double del(double a, double b) { return a / b; }
 
-double sin(double x) { return sin(x); }
-double cos(double x) { return cos(x); }
-double sqrt(double x) { return sqrt(x); }
+double sinus(double x) { return sin(x); }
+double cosinus(double x) { return cos(x); }
+double odmocnin(double x) { return sqrt(x); }
 double mocnina(double zaklad, double exponent) {
     return pow(zaklad, exponent);  // Funkcia 'pow' z matematickej knižnice
 }
-double log(double x) { return log(x); }
+double logaritmus(double x) { return log(x); }
 
 // Funkcia na konverziu infixového výrazu na postfixový (Shunting-yard algoritmus)
 void infix_na_postfix(const char *infix, char *postfix) {