Lim x->0 (cos x sin x -tan x)/( x² sin x)
Matematika
lailatulhadawiy
Pertanyaan
Lim x->0 (cos x sin x -tan x)/( x² sin x)
1 Jawaban
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1. Jawaban daffaci
Lim x>0 (cos x sin x - tan x)/(x2 sin x)
= Lim x>0 (cos x sin x - sin x / cos x)/(x2 sin x)
= Lim x>0 sin x ( cos x - 1/cos x)/(x2 sin x)
= Lim x>0 cos x - 1/cos x/x2
= Lim x>0 cos x(cos x - 1/cos x)/x2 cos x (kali cos x semua)
= Lim x>0 cos2 x - 1/x2 cos x
= Lim x>0 1 - sin2 x - 1 / x2 cos x
= Lim x>0 -sin2x / x2 cos x
= -1/1
= -1