Nilai dari cos45.cos30+sin45.sin60 Per tan30.cotan 30

Bab Trigonometri

(cos 45° × cos 30° + sin 45° × sin 60°)/(tan 30° × cotan 30°)
= (1/2 √2 × 1/2 √3 + 1/2 √2 + 1/2 √3)/(tan 30° × 1/tan 30°)
= (1/4 √6 + 1/4 √6)/1
= 2(1/4 √6)
= 1/2 √6