Rumus umum limit trigonometri
\(\displaystyle \lim_{x \rightarrow \: 0}\dfrac{\sin ax}{bx} = \dfrac ab\)
\(\displaystyle \lim_{x\rightarrow \: 0}\dfrac{\tan ax}{bx} = \dfrac ab\)
\(\displaystyle \lim_{x\rightarrow \: m}\dfrac{\sin a(x - m)}{b(x - m)} = \dfrac ab\)
\(\displaystyle \lim_{x\rightarrow \: m}\dfrac{\tan a(x - m)}{b(x - m)} = \dfrac ab\)