Definition:
where 
is the slope of the line tangent to 
at 
.
A function is said to have derivable at a point 
if it has finite derivate at that point, which happens
if the side derivates are equal. In that case
Properties of the derivatives:
Derivates of some trigonometric functions:
The fundamental equation of trigonometrics:
Sine and cosine as linear combinations of complex exponentials:
Useful formulas:
A function 
is said to be continous at some point 
iff :
Some properties:
If two events are incompatibles or dijoint:
If two events are independent:
Conditional probability:
Binomial probability law:
Factorial:
Ordered combinations without repetitions:
Ordered combinations with repetitions:
Unordered combinations without repetitions:
Some properties of unordered combinations without repetitions:
General formula:
Some useful formulas from the particular case, 
:
Definition:
Some trigonometric limits:
The Neper number related limits:
and the following theorems
and 
then, 
.
for all 
then, 
.
Definition:
Sum of 
elements of the progression:
Definition:
Sum of 
elements of the progression:
Sum of all the elements:
Variance of some data around the mean:
Principle of the error propagation:
Linear regression (
):
