Matematika

Pertanyaan

Lim x->0 (cos x sin x -tan x)/( x² sin x)

1 Jawaban

  • 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

Pertanyaan Lainnya