October 2018 1 12 Report

1. Sprawdź podaną tożsamość: (1+sinx)(1/cosx-tgx)= cosx.

2. W kwadrat wpisano koło, a następnie w to koło wpisano znów kwadrat. Różnica pól kwadratów wynosi 8 cm2. Oblicz pole koła.

3. Wyznacz liczbę, której 14% stanowi 105

4. Cena lodówki została obniżona o 7% i lodówka kosztuje obecnie 930 zł. Jaka była cena lodówki przed obniżką?

5. Znajdź wartości pozostałych funkcji trygonometrycznych, gdy:

a) cosx= -5/13 i xE(;3/2)

b) ctgx=2 i xE(;3/2) (tylko zaraz po otwarciu nawiasów i przed zamknięciem jest taki jakby chiński znaczek którego nie umiem dodać (chyba Pi czy coś takiego )

Proszę pomóżcie mi bo bardzo tego potrzebuję....


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