Question

3 примера нужны задание номер 1

Answer 1

α=π/6 ⇒ sin2α=sin(2*π/6)=sinπ/3=√3/2
sinα=0,18 ⇒ cos(π/2-α)=sinα=0,18
α=π/3 ⇒ sinα/2=sinπ/6=1/2