Definition:-
In addition to the various functions you can create, C++ also
includes some useful functions you can use. These functions are available in
standard C and C++ libraries and called built-in functions.
These are functions that can be included in your program and then use.
C++ has a rich set of mathematical operations, which can be
performed on various numbers. Following table lists down some useful built-in
mathematical functions available in C++.
Operations:
Sr.No
|
Function & Purpose
|
1
|
double
cos(double);
This
function takes an angle (as a double) and returns the cosine.
|
2
|
double
sin(double);
This
function takes an angle (as a double) and returns the sine.
|
3
|
double
tan(double);
This
function takes an angle (as a double) and returns the tangent.
|
4
|
double
log(double);
This
function takes a number and returns the natural log of that number.
|
5
|
double
pow(double, double);
The
first is a number you wish to raise and the second is the power you wish to
raise it t
|
6
|
double
hypot(double, double);
If you
pass this function the length of two sides of a right triangle, it will
return you the length of the hypotenuse.
|
7
|
double
sqrt(double);
You
pass this function a number and it gives you the square root.
|
8
|
int
abs(int);
This function
returns the absolute value of an integer that is passed to it.
|
9
|
double
fabs(double);
This
function returns the absolute value of any decimal number passed to it.
|
10
|
double
floor(double);
Finds
the integer which is less than or equal to the argument passed to it.
|
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