f(x) = 2/sin^2 (3x); M(π/6; 3)
F(x) = 2/3*ctg (3x) + C
F(π/6) = 2/3*ctg (π/2) + C = 3
2/3*0 + C = C = 3
F(x) = 2/3*ctg (3x) + 3
f(x) = 2/sin^2 (3x); M(π/6; 3)
F(x) = 2/3*ctg (3x) + C
F(π/6) = 2/3*ctg (π/2) + C = 3
2/3*0 + C = C = 3
F(x) = 2/3*ctg (3x) + 3