Diketahui f(x)=cos²x + cos 2x sin x. Nilai f(π/6)

Mapel Matematika
Bab Fungsi Trigonometri

π/6 = 180°/6 = 30°

f(30°) = (cos 30°)^2 + cos2(30°) sin30°
f(30°) = (✓3/2)^2 + (1/2)(1/2)
f(30°) = (3/4) + (1/4)
f(30°) = 1

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