9*sin(π/6)*(π/6) = 9* (π/6) sin(π/6) = 3π/2 sin(π/6)
Можно продолжить далее
3π/2 sin(π/6) = 3π/2 * 1/2 = 3π/4 , так как sin(π/6)= 1/2
9*sin(π/6)*(π/6) = 9* (π/6) sin(π/6) = 3π/2 sin(π/6)
Можно продолжить далее
3π/2 sin(π/6) = 3π/2 * 1/2 = 3π/4 , так как sin(π/6)= 1/2