uTools-Manuals/docs/c/tanh.html
2019-04-21 11:50:48 +08:00

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<h1>数学函数 - tanh</h1>
<p>原型extern float tanh(float x);</p>
<p>用法:#include &lt;math.h></p>
<p>功能求x的双曲正切值</p>
<p>说明tanh(x)=(e^x-e^(-x))/(e^2+e^(-x))</p>
举例:<pre><code class="language-c">
// tanh.c
#include &lt;syslib.h>
#include &lt;math.h>
main()
{
float x;
clrscr(); // clear screen
textmode(0x00); // 6 lines per LCD screen
x=PI/4.;
printf("tanh(%.4f)=%.4f\n",x,tanh(x));
getchar();
return 0;
}
</code></pre>相关函数:<a href="sinh.html">sinh</a>,<a href="cosh.html">cosh</a>