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<h1>数学函数 - asin</h1>
<p>原型extern float asin(float x);</p>
<p>用法:#include &lt;math.h></p>
<p>功能求x弧度表示的反正弦值</p>
<p>说明x的定义域为[-1.01.0],值域为[-π/2+π/2]。</p>
举例:<pre>
// asin.c
#include &lt;syslib.h>
#include &lt;math.h>
main()
{
float x;
clrscr(); // clear screen
textmode(0x00); // 6 lines per LCD screen
x=0.32;
printf("asin(%.2f)=%.4f",x,asin(x));
getchar();
return 0;
}
</pre>相关函数:<a href="acos.html">acos</a>,<a href="atan.html">atan</a>,<a href="atan2.html">atan2</a>,<a href="sin.html">sin</a>,<a href="cos.html">cos</a>,<a href="tan.html">tan</a>