Matematika

Pertanyaan

Nilai dari lim x → 0 sin2x - tan2x / x³ adalah?

1 Jawaban

  • Lim (sin 2x - Tan 2x)/x^3
    = Lim (sin 2x - (sin 2x)/(cos 2x)) / x^3 . (cos 2x)/(cos 2x)
    = Lim (sin 2x cos 2x - sin 2x) / (cos 2x . x^3)
    = Lim sin 2x (cos 2x - 1) / (cos 2x . x^3)
    = Lim sin 2x . -2 sin^2 x / (cos 2x . x^3)
    = Lim -2/(cos 2x) . (sin 2x)/x . (sin x)/x . (sin x)/x
    = -2/(cos 2.0) . 2/1 . 1 . 1
    = -2/(cos 0) . 2
    = -2/1 . 2
    = -4

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