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Verified answer
f(x) = 12 12--------------- = ----------------------
√3cosx+sinx+c 2 cos (x-30) +c
Ubah bentuk penyebut
k = √((√3)² + 1²) = 2
tan α = 1/√3 ⇒α = 30°
nilai maks = 3 diperoleh saat cos(x-30) = -1, sehingga
3 = 12/(-2+c) -> c = 6
nilai min diperoleh saat cos (x-30) = 1
jadi f(x) = 12/(2+6)= 3/2