2.1.16.7.7 sin

1 Description
2 Syntax
3 Parameters
4 Return
5 Examples
6 Remark
7 See Also
8 Header to Include
9 Reference

Description

Calculate sine of a complex value.

Calculate sine of a double value.

Syntax

complex sin( complex z )

double sin( double x )

Parameters

z: [input] the complex value whose sine is sought.

x: [input] Angle in radians.

Return

The sine

The sin function returns the sines of x.

Examples

EX1

void    run_complex_sin()
{
    complex        cc(0.5, 0.8);
    
    out_complex("sin = ", sin(cc)); // Result is "sin = 0.641200+0.779386i"
}

EX2

//This program computes and displays the sines of x.

#include <origin.h>

int test_sin()
{
    double vv;
    vv = sin( 0 );
    out_double("sin(0)=", vv);        //output should be sin(0)=0
    ASSERT( is_equal(vv, 0) );
    vv = sin( PI/6);
    out_double("sin(PI/6)=", vv);    //output should be sin(PI/6)=0.5
    ASSERT(is_equal(round(vv,5), 0.5) );
    vv = sin(5.20);
    out_double("sin(5.20)=", vv);    //output should be sin(5.20)=-0.88345
    ASSERT(is_equal(round(vv,5), -0.88345) );
    
    return 1;
}