Question: lim x 0 c o s 4 x + c o s 6 x - c o s 6 x c o s 4 x

limx0cos4x+cos6x-cos6xcos4x-14x2,tan22x=cdots
A.1
B,-3
C.-5
D.-7
E.-9
 limx0cos4x+cos6x-cos6xcos4x-14x2,tan22x=cdots A.1 B,-3 C.-5 D.-7 E.-9

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