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rumus menyenangkan trigono
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Matematika Kelas X
RUMUS-RUMUS TRIGONOMETRI
1. Trigonometrisin(90 º- α) = cos αcos(90 º- α) = sin αtan(90 º- α) = cot αsin(180 º- α) = sin αcos(180 º- α) = -cos αtan(180 º- α) = -tan αsin(90 º+ α) = cos αcos(90 º+ α) = -sin αtan(90 º+ α) = -cot αsin(180 º+ α) = -sin αcos(180 º+ α) = -cos αtan(180 º+ α) = tan α
2. Aturan sinus:
3. Aturan cosinus:
4. Luas segitiga:
5. Persamaan trigonometri:Persamaan dasar sinus: sin x = sin α
x = α + k . 360x = 180 – α + k . 360
Persamaan dasar cosinus: cos x = cos αx = α + k . 360x = – α + k . 360
Persaman dasar tangen: tan x = tan αx = α + k . 180
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