Odpowiedź:
zadanie 4
a) sin > 0 cos > 0 tg > 0
b)sin > 0 cos > 0 tg > 0
c)sin > 0 cos < 0 tg < 0
d) sin > 0 cos < 0 tg < 0
zadanie 5
a) sin150⁰ = sin(180⁰ - 30⁰) = sin30⁰ = ½
b) cos120⁰ = cos(180⁰ - 60⁰) = -cos60⁰ = -½
c) tg225⁰ = tg(225⁰-180⁰) = tg45⁰ = 1
