\( \lim \limits_{x \to 0} { { \sin 3x} \over x} = \)______。______
举一反三
- \( \lim \limits_{x \to {0^ + }} { { \ln \sin 3x} \over {\ln \sin x}} = 3 \)。
- \( \lim \limits_{x \to 0} { { \sin 3x} \over x} = \)______。______
- \(\lim \limits_{x \to 0} 2 { { \tan x - \sin x} \over { { {\sin }^3}x}}{\rm{ = }}\)______ 。
- \( \lim \limits_{x \to 0} { { x - \arcsin x} \over { { {\sin }^3}x}} = {1 \over 6} \)
- \(\mathop {\lim }\limits_{x \to 0} 2 { { \tan x - \sin x} \over { { {\sin }^3}x}}{\rm{ = }}\)______。______