C++

Reference

<cmath> (math.h)

function
<cmath> <ctgmath>

sin

double sin(double x);
 double sin (double x); float sinf (float x);long double sinl (long double x);
 double sin (double x); float sin (float x);long double sin (long double x);
 double sin (double x); float sin (float x);long double sin (long double x); double sin (T x); // additional overloads for integral types
Compute sine
Returns the sine of an angle of x radians.

Header <tgmath.h> provides a type-generic macro version of this function.
This function is overloaded in <complex> and <valarray> (see complex sin and valarray sin).
Additional overloads are provided in this header (<cmath>) for the integral types: These overloads effectively cast x to a double before calculations (defined for T being any integral type).

This function is also overloaded in <complex> and <valarray> (see complex sin and valarray sin).

Parameters

x
Value representing an angle expressed in radians.
One radian is equivalent to 180/PI degrees.

Return Value

Sine of x radians.

Example

1
2
3
4
5
6
7
8
9
10
11
12
13
14
 
/* sin example */ #include <stdio.h> /* printf */ #include <math.h> /* sin */ #define PI 3.14159265 int main () { double param, result; param = 30.0; result = sin (param*PI/180); printf ("The sine of %f degrees is %f.\n", param, result ); return 0; }

Output:
 The sine of 30.000000 degrees is 0.500000.


See also

cos
Compute cosine (function)
tan
Compute tangent (function)