Question

Сделайте одно задание B4 плз

Answer 1

sin(19π/6)=sin(3π + π/6) = -sin(π/6)= - 1/2
cos(7π/6)=cos(π + π/6)=-cos(π/6) = -√3/2

(-1/2)² + 7*(-√3/2)²=1/4  +  21/4= 22/4=5.5
Ответ: 5,5