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Bab LimitMatematika SMA Kelas X
lim (1 - cos x)/(1 + sin x) = lim ((1 - cos x)/(1 + sin x)) . ((1 - sin x)/(1 - sin x))
x→0 x→0
= lim ((1 - cos x) (1 - sin x))/(1 - sin² x)
x→0
= lim ((1 - cos x) (1 - sin x))/cos² x
x→0
masukkan 0
= (1 - cos 0) (1 - sin 0) / (cos 0)²
= (1 - 1) . (1 - 0) / 1²
= 0 . 1 / 1
= 0
x=>0
= (1 - cos 0) / (1 + sin 0)
= (1 - 1) / (1 + 0)
= 0/1
= 0
Catatan : kita substitusi x = 0 karena hasilnya tidak 0/0