Cos^2(30°) - sin^2(120°)+ 8 sin 60°. Cos120° Tolong dibantu yaa
Matematika
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Pertanyaan
Cos^2(30°) - sin^2(120°)+ 8 sin 60°. Cos120°
Tolong dibantu yaa
Tolong dibantu yaa
1 Jawaban
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1. Jawaban Anonyme
cos² 30° - sin² 120° + 8 sin 60° cos 120°
= (1/2 √3)² - (1/2 √3)² + 8 . (1/2 √3) . (-1/2)
= 3/4 - 3/4 - 2√3
= -2√3