?? sin.html
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<li><a href="abs.html">abs</a></li>
<li><a href="acos.html">acos</a></li>
<li><a href="asin.html">asin</a></li>
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<li><a href="sin.html">sin</a></li>
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<li><a href="sinh.html">sinh</a></li>
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<li><a href="tan.html">tan</a></li>
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<pre>
原型：extern float sin(float x);
用法：#include <math.h>
功能：計(jì)算x（弧度表示）的正弦值。
說明：x的值域?yàn)閇-1.0，1.0]。
舉例：
// sin.c
#include <syslib.h>
#include <math.h>
main()
{
float x;
clrscr(); // clear screen
textmode(0x00); // 6 lines per LCD screen
x=M_PI/2; // M_PI=PI=3.14159265..., defined in math.h
printf("sin(PI/2)=%f",sin(x));
getchar();
return 0;
}
相關(guān)函數(shù)：<a href="asin.html">asin</a>,<a href="acos.html">acos</a>,<a href="atan.html">atan</a>,<a href="atan2.html">atan2</a>,<a href="cos.html">cos</a>,<a href="tan.html">tan</a>
</pre>
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