tolong teman2 bsok harus dikumpulkan no 1 pakai cara yah teman2

tolong dikoreksi lagi kalo ada salah perhitungan :)

f(x) = 3 tan 2x
1Π = 180°

= f(Π/6) -f(5Π/12) + f(7Π/12)
= f(180°/6) - f(5.180/12) + f (7.180/12)
= f(30°) - f(75°) + f (105°)
= 3 tan 2(30°) - 3 tan 2(75°) + 3 tan 2(105°)
= 3 tan 60° - 3 tan 150° + 3 tan 210°
= 3(√3) - 3(-1/3√3) + 3(1/3√3)
= 3√3 + √3 + √3
= 5√3