Penjelasan dengan langkah-langkah:
TRIGONOMETRI DASAR
7. Pada kuadran IV
Sinus = Tangen = negatif
Cosinus = positif
8. A(–2√2, –2√2) → kuadran III
r = √(–2√2)²+(–2√2)²
r = √(4 × 2 × 2)
r = √(4²)
r = 4
Tan ∅ = y
x
Tan ∅ = –2√2
–2√2
Tan ∅ = 1
∅ = 45°
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Penjelasan dengan langkah-langkah:
TRIGONOMETRI DASAR
7. Pada kuadran IV
Sinus = Tangen = negatif
Cosinus = positif
8. A(–2√2, –2√2) → kuadran III
r = √(–2√2)²+(–2√2)²
r = √(4 × 2 × 2)
r = √(4²)
r = 4
Tan ∅ = y
x
Tan ∅ = –2√2
–2√2
Tan ∅ = 1
∅ = 45°
Koordinat Kutub A(1, 225°)