C++ being superset of C, supports large number of useful mathematical functions. These functions are available in standard C++ and C to support various mathematical calculations. Instead of focusing on implementation, these functions can be directly used to simplify code and programs. C++ provides large set of mathematical functions which are stated below –
In order to use these functions you need to include header file- <math.h> or <cmath>.
- double sin(double) : This function takes angle (in degree) as an argument and return its sine value that could be verified using sine curve.
- double cos(double) : This function takes angle (in degree) as an argument and return its cosine value that could be verified using cosine curve.
- double tan(double) : This function takes angle (in degree) as an argument and return its tangent value. This could also be verified using Trigonometry as Tan(x) = Sin(x)/Cos(x).
- double sqrt(double) : This function takes number as an argument and return its square root value. Number can not be negative value.
- int abs(int) : This function takes integer number as an argument and return its absolute value. It means, the output will always be positive regardless of sign of input.
- double pow(double, double) : This function takes one argument as base and other as exponent.
- double hypot(double, double) : This function requires two sides of the right angled triangle to give output as its hypotenuse.
- double floor(double) : This functions returns the integer value lesser or equal to argument passed in the function.
- double fabs(double) : This function returns the absolute value of any number.
- double acos(double) : This function returns the arc cosine of argument. The argument to acos() must be in the range -1 to 1 ; otherwise, a domain error occurs.
- double asin(double) : This function returns the arc sine of argument. The argument to asin() must be in the range -1 to 1 ; otherwise, a domain error occurs.
- double atan(double) : This function returns the arc tangent of arg.
- double atan2(double, double) : This function returns the arc tangent of (double a)/(double b).
- double ceil(double) : This function returns the smallest integer as double not less than the argument provided.
- double cosh(double) : This function returns the hyperbolic cosine of argument provided. The value of argument provided must be in radians.
- double tanh(double) : This function returns the hyperbolic tangent of argument provided. The value of argument provided must be in radians.
- double log(double) : This function takes a number and returns the natural log of that number.
CPP
#include <iostream>
#include <math.h>
using
namespace
std;
int
main()
{
double
x = 2.3;
cout <<
"Sine value of x=2.3 : "
<<
sin
(x) << endl;
cout <<
"Cosine value of x=2.3 : "
<<
cos
(x) << endl;
cout <<
"Tangent value of x=2.3 : "
<<
tan
(x) << endl;
double
y = 0.25;
cout <<
"Square root value of y=0.25 : "
<<
sqrt
(y) << endl;
int
z = -10;
cout <<
"Absolute value of z=-10 : "
<<
abs
(z) << endl;
cout <<
"Power value: x^y = (2.3^0.25) : "
<<
pow
(x, y) << endl;
x = 3.0;
y = 4.0;
cout <<
"Hypotenuse having other two sides as x=3.0 and"
<<
" y=4.0 : "
<< hypot(x, y) << endl;
x = 4.56;
cout <<
"Floor value of x=4.56 is : "
<<
floor
(x) << endl;
x = -4.57;
cout <<
"Absolute value of x=-4.57 is : "
<<
fabs
(x) << endl;
x = 1.0;
cout <<
"Arc Cosine value of x=1.0 : "
<<
acos
(x) << endl;
cout <<
"Arc Sine value of x=1.0 : "
<<
asin
(x) << endl;
cout <<
"Arc Tangent value of x=1.0 : "
<<
atan
(x) << endl;
y = 12.3;
cout <<
"Ceiling value of y=12.3 : "
<<
ceil
(y) << endl;
x = 57.3;
cout <<
"Hyperbolic Cosine of x=57.3 : "
<<
cosh
(x) << endl;
cout <<
"Hyperbolic tangent of x=57.3 : "
<<
tanh
(x) << endl;
y = 100.0;
cout <<
"Log value of y=100.0 is : "
<<
log
(y) << endl;
return
0;
}
Output:
Sine value of x=2.3 : 0.745705 Cosine value of x=2.3 : -0.666276 Tangent value of x=2.3 : -1.11921 Square root value of y=0.25 : 0.5 Absolute value of z=-10 : 10 Power value: x^y = (2.3^0.25) : 1.23149 Hypotenuse having other two sides as x=3.0 and y=4.0 : 5 Floor value of x=4.56 is : 4 Absolute value of x=-4.57 is : 4.57 Arc Cosine value of x=1.0 : 0 Arc Sine value of x=1.0 : 1.5708 Arc Tangent value of x=1.0 : 0.785398 Ceiling value of y=12.3 : 13 Hyperbolic Cosine of x=57.3 : 3.83746e+24 Hyperbolic tangent of x=57.3 : 1 Log value of y=100.0 is : 4.60517
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