"Calculator" "Is geen getal" "Fout" "," "0" "1" "2" "3" "4" "5" "6" "7" "8" "9" "cos" "ln" "log" "sin" "tan" "wis" "←" "constante van Neper" "pi" "punt" "linkerhaakje" "rechterhaakje" "cosinus" "natuurlijk logaritme" "logaritme" "sinus" "tangens" "plus" "delen" "faculteit" "keer" "macht" "vierkantswortel" "min" "wissen" "verwijderen" "is gelijk aan"