Buktikan sin²-cos² = (sin²)² - (cos²)²
Matematika
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Pertanyaan
Buktikan
sin²-cos² = (sin²)² - (cos²)²
sin²-cos² = (sin²)² - (cos²)²
1 Jawaban
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1. Jawaban Iruchi
pembuktian dari kanan:
(sin^2)^2 - (cos^2)^2 =
(sin^2 + cos^2)(sin^2 - cos^2) =
1 (sin^2 - cos^2) =
sin^2 - cos^2