Logarithm

a>0

a>0 and l>0

Differential Function : [f(x)]^r = r[f(x)]^(r-1)

Before you see this post,

see

Differential Function : ln x

and

Differential of A Function : f(x)g(x)

q isn't zero.

Limit of A Function : a^[f(x)]

f(x) is a continuous function.

Differential Function : ln x

Before you see this post,

see

A Property of Limit of A Function : f(x)g(x)

and

e ( mathematical constant )

Limit of sin(x)/x and tan(x)/x

Before you see this post,

see

A Property of Limit of A Function : f(x)/g(x),

Trigonometric Function : Sine, Cosine and Tangent,

Graph of Trigonometric Function : Sine, Cosine and Tangent

and

Radian

First, Let's divide the formula by sinθ.

There is a result.

Second, Let's divide the formula by tanθ. 

There is a result.

A Property of Limit of A Function : log_r [f(x)]

f(x) is a continuous function.

δ=δ0

e ( mathematical constant )

Before you see this post,

see

A Property of Limit of A Function : f(x)g(x)

and

A Property of Limit of A Function : log(r) [f(x)]