lim(θ⇒ 0) tanθ / θ

if
lim(x⇒0-) f(x) ≠ lim(x⇒0+)
then

if
lim(x⇒0-) f(x) = lim(x⇒0+) = 0
then

lim(h⇒0) f(x+h)-f(x) / h =

d/dx c

d/dx [f.f] =

d/dx [f.f.f] =

d/dx [f]^n =

d/dx e^x

d/dx a^x

the default value of the base in the logarithmic function is

the base value in ln function is

the base value in lig function is

y = log(a) x
y' =

d/dx e^2x

d/dx (sin u) =

d/dx (sin tan x) =

d/dx (sin x tan x) =

d/dx e^f(x) =