Tentukan y' jika : 1) y = sin 5x + cos 6x - sin 3x 2. y = (1 - sin x)(1 - cos x)

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\text{SOAL 1}\\
y'=5\cos{5x}-6\sin{6x}-3\sin{3x}\\
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\text{SOAL 2}\\
y'=-\cos{x}\left(1-\cos{x}\right)+\sin{x}\left(1-\sin{x}\right)=-\cos{x}+\cos^2{x}+\sin{x}-\sin^2{x}=\cos{2x}+\sin{x}-\cos{x}\\
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