Ответ:
x=-2 Будет корнем уравнения
Sкруга = πR² = π·1 = π
Sсект = πr²·α/360°
π·4·α/360° = π
α/90° = 1
α = 90°
26/ (sin -47п/6 cos32п/3)=26/(sin((-48p+p)/6)cos((33p-p)/3))=26/(sin(-8p+p/6)cos(11p-p/3))=26/(sin(p/6)(-cos(p/3)))=26/(1/2(-1/2))=-26/(1/4)=-26*4=-104