bantu dgn cara

lim x⇥0 (1 - cos 2x)/sin² 2x = lim x⇢0 (2 sin 2x)/(2 sin 2x . 2 cos 2x) = lim x⇢0 1/(2 cos 2x) = 1/(2 cos (2.0)) = 1/(2.1) = 1/2