hasil dari: 2 cos 75 derajat sin 5 derajat
Matematika
Kurniawan151
Pertanyaan
hasil dari: 2 cos 75 derajat sin 5 derajat
1 Jawaban
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1. Jawaban mutiaravirgine
2 × cos 75° × sin 5°
= 2 × (cos 30° + 45°) × (sin 45° - 30°)
= 2 × (1/2√3 + 1/2√2) × (1/2√2 - 1/2)
= (√3 + √2) × (1/2√2 - 1/2)
= 1/2√6 - 1/2√3 + 1/2√4 - 1/2√2
= 1/2√6 - 1/2√3 + 2/2 - 1/2√2
= 1/2 (√6 - √3 + 2 - √2)