(sin x + cos x)² + (sin x - cos x)²
Matematika
yuliasari123
Pertanyaan
(sin x + cos x)² + (sin x - cos x)²
1 Jawaban
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1. Jawaban Fitra910
(sin x + cos x)^2 + (sin x - cos x)^2 = sin^2 x + 2 sin x cos x + cos^2 x + sin^2 x -2 sin x cos x + cos^2 x = 2 sin^2 x + 2 cos^2 x = 2 (sin^2 x + cos^2 x) = 2 (1) = 2