?? acos.html
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<li><a href="abs.html">abs</a></li>
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<li><a href="acos.html">acos</a></li>
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<li><a href="asin.html">asin</a></li>
<li><a href="atan.html">atan</a></li>
<li><a href="atan2.html">atan2</a></li>
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<li><a href="cosh.html">cosh</a></li>
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<li><a href="tanh.html">tanh</a></li>
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<pre>
原型：extern float acos(float x);
用法：#include <math.h>
功能：求x（弧度表示）的反余弦值
說(shuō)明：x的定義域?yàn)閇-1.0，1.0]，值域?yàn)閇0，π]。
舉例：
// acos.c
#include <syslib.h>
#include <math.h>
main()
{
float x;
clrscr(); // clear screen
textmode(0x00); // 6 lines per LCD screen
x=0.32;
printf("acos(%.2f)=%.4f",x,acos(x));
getchar();
return 0;
}
相關(guān)函數(shù)：<a href="asin.html">asin</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>
</pre>
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