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semoga membantu :) maaf tidak bisa bantu semuanya :)
5) lim (2 sin² x/2)/x sin x = 2(x²/4)/x² = 1/2
x-> 0
6) lim (1 - (1 - 2sin² 4x))/(sin 2x tan 2x)
x-> 0
= lim (2sin² 4x)/(sin 2x tan 2x)
x-> 0
= 2(16x²)/4x²
= 8