"Kalkulaator" "Pole number" "Viga" "," "0" "1" "2" "3" "4" "5" "6" "7" "8" "9" "cos" "ln" "log" "sin" "tan" "tüh" "kus" "Euleri arv" "pii" "punkt" "vasaksulg" "paremsulg" "koosinus" "naturaallogaritm" "logaritm" "siinus" "tangens" "pluss" "jaga" "faktoriaal" "korruta" "aste" "ruutjuur" "miinus" "tühjenda" "kustuta" "võrdub"