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		<title>C/Math/Tan ATan - История изменений</title>
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		<updated>2026-04-09T10:33:26Z</updated>
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		<id>http://cppe.ru/index.php?title=C/Math/Tan_ATan&amp;diff=158&amp;oldid=prev</id>
		<title> в 14:20, 25 мая 2010</title>
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				<updated>2010-05-25T14:20:56Z</updated>
		
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	<entry>
		<id>http://cppe.ru/index.php?title=C/Math/Tan_ATan&amp;diff=159&amp;oldid=prev</id>
		<title>Admin: 1 версия:&amp;#32;Импорт контента...</title>
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				<updated>2010-05-25T10:22:21Z</updated>
		
		<summary type="html">&lt;p&gt;1 версия: Импорт контента...&lt;/p&gt;
&lt;p&gt;&lt;b&gt;Новая страница&lt;/b&gt;&lt;/p&gt;&lt;div&gt;==Calculate arctangent, 2 parameters: how to use atan2 ==&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
   &lt;br /&gt;
&amp;lt;source lang=&amp;quot;cpp&amp;quot;&amp;gt;&lt;br /&gt;
#include &amp;lt;stdio.h&amp;gt;&lt;br /&gt;
#include &amp;lt;math.h&amp;gt;&lt;br /&gt;
#define PI 3.14159265&lt;br /&gt;
int main ()&lt;br /&gt;
{&lt;br /&gt;
  double x, y, result;&lt;br /&gt;
  x = 0;&lt;br /&gt;
  y = 6;&lt;br /&gt;
  result = atan2 (y, x) * 180 / PI;&lt;br /&gt;
  printf (&amp;quot;Arctangent for (x = %lf, y = %lf) is %lf degrees\n&amp;quot;, x, y, result );&lt;br /&gt;
  return 0;&lt;br /&gt;
}&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
           &lt;br /&gt;
       &amp;lt;/source&amp;gt;&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==Calculate arctangent: how to use atan==&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
   &lt;br /&gt;
&amp;lt;source lang=&amp;quot;cpp&amp;quot;&amp;gt;&lt;br /&gt;
&lt;br /&gt;
#include &amp;lt;stdio.h&amp;gt;&lt;br /&gt;
#include &amp;lt;math.h&amp;gt;&lt;br /&gt;
#define PI 3.14159265&lt;br /&gt;
int main ()&lt;br /&gt;
{&lt;br /&gt;
  double v, result;&lt;br /&gt;
  v = 5;&lt;br /&gt;
  &lt;br /&gt;
  result = atan ( v ) * 180 / PI;&lt;br /&gt;
  printf (&amp;quot;Arctangent of %lf is %lf degrees\n&amp;quot;, v, result );&lt;br /&gt;
  return 0;&lt;br /&gt;
}&lt;br /&gt;
&lt;br /&gt;
           &lt;br /&gt;
       &amp;lt;/source&amp;gt;&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==Calculate hyperbolic tangent: how to use tanh ==&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
   &lt;br /&gt;
&amp;lt;source lang=&amp;quot;cpp&amp;quot;&amp;gt;&lt;br /&gt;
#include &amp;lt;stdio.h&amp;gt;&lt;br /&gt;
#include &amp;lt;math.h&amp;gt;&lt;br /&gt;
#define PI 3.14159265&lt;br /&gt;
int main ()&lt;br /&gt;
{&lt;br /&gt;
  double param, result;&lt;br /&gt;
  param = 60;&lt;br /&gt;
  result = tanh (param*PI/180);&lt;br /&gt;
  printf (&amp;quot;Hyperbolic tangent of %lf degrees is %lf\n&amp;quot;, param, result );&lt;br /&gt;
  return 0;&lt;br /&gt;
}&lt;br /&gt;
&lt;br /&gt;
           &lt;br /&gt;
       &amp;lt;/source&amp;gt;&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==Calculate tangent: tan==&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
   &lt;br /&gt;
&amp;lt;source lang=&amp;quot;cpp&amp;quot;&amp;gt;&lt;br /&gt;
&lt;br /&gt;
#include &amp;lt;stdio.h&amp;gt;&lt;br /&gt;
#include &amp;lt;math.h&amp;gt;&lt;br /&gt;
#define PI 3.14159265&lt;br /&gt;
int main () {&lt;br /&gt;
  double param, result;&lt;br /&gt;
  param = 45;&lt;br /&gt;
  result = tan ( param * PI / 180);&lt;br /&gt;
  printf (&amp;quot;Tangent  %lf degrees = %lf\n&amp;quot;, param, result );&lt;br /&gt;
  return 0;&lt;br /&gt;
}&lt;br /&gt;
&lt;br /&gt;
           &lt;br /&gt;
       &amp;lt;/source&amp;gt;&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==How to use atan==&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
   &lt;br /&gt;
&amp;lt;source lang=&amp;quot;cpp&amp;quot;&amp;gt;&lt;br /&gt;
#include &amp;lt;math.h&amp;gt;&lt;br /&gt;
#include &amp;lt;stdio.h&amp;gt;&lt;br /&gt;
int main(void) &lt;br /&gt;
{&lt;br /&gt;
  double val = -1.0;&lt;br /&gt;
  do {&lt;br /&gt;
    printf(&amp;quot;Arc tangent of %f is %f.\n&amp;quot;, val, atan(val));&lt;br /&gt;
    val += 0.1;&lt;br /&gt;
  } while(val&amp;lt;=1.0);&lt;br /&gt;
  return 0;&lt;br /&gt;
}&lt;br /&gt;
           &lt;br /&gt;
       &amp;lt;/source&amp;gt;&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==How to use atan2==&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
   &lt;br /&gt;
&amp;lt;source lang=&amp;quot;cpp&amp;quot;&amp;gt;&lt;br /&gt;
#include &amp;lt;math.h&amp;gt;&lt;br /&gt;
#include &amp;lt;stdio.h&amp;gt;&lt;br /&gt;
int main(void)&lt;br /&gt;
{&lt;br /&gt;
  double val = -1.0;&lt;br /&gt;
  do {&lt;br /&gt;
    printf(&amp;quot;Atan2 of %f is %f.\n&amp;quot;, val, atan2(val,1.0));&lt;br /&gt;
    val += 0.1;&lt;br /&gt;
  } while(val&amp;lt;=1.0);&lt;br /&gt;
  return 0;&lt;br /&gt;
}&lt;br /&gt;
&lt;br /&gt;
           &lt;br /&gt;
       &amp;lt;/source&amp;gt;&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==How to use tan==&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
   &lt;br /&gt;
&amp;lt;source lang=&amp;quot;cpp&amp;quot;&amp;gt;&lt;br /&gt;
#include &amp;lt;math.h&amp;gt;&lt;br /&gt;
#include &amp;lt;stdio.h&amp;gt;&lt;br /&gt;
int main(void)&lt;br /&gt;
{&lt;br /&gt;
  double val = -1.0;&lt;br /&gt;
  do {&lt;br /&gt;
    printf(&amp;quot;Tangent of %f is %f.\n&amp;quot;, val, tan(val));&lt;br /&gt;
    val += 0.1;&lt;br /&gt;
  } while(val&amp;lt;=1.0);&lt;br /&gt;
  return 0;&lt;br /&gt;
}&lt;br /&gt;
&lt;br /&gt;
           &lt;br /&gt;
       &amp;lt;/source&amp;gt;&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
==Hyperbolic tangent: how to use tanh==&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
   &lt;br /&gt;
&amp;lt;source lang=&amp;quot;cpp&amp;quot;&amp;gt;&lt;br /&gt;
#include &amp;lt;math.h&amp;gt;&lt;br /&gt;
#include &amp;lt;stdio.h&amp;gt;&lt;br /&gt;
int main(void)&lt;br /&gt;
{&lt;br /&gt;
  double val = -1.0;&lt;br /&gt;
  do {&lt;br /&gt;
    printf(&amp;quot;Hyperbolic tangent of %f is %f.\n&amp;quot;, val, tanh(val));&lt;br /&gt;
    val += 0.1;&lt;br /&gt;
  } while(val&amp;lt;=1.0);&lt;br /&gt;
  return 0;&lt;br /&gt;
}&lt;br /&gt;
&lt;br /&gt;
           &lt;br /&gt;
       &amp;lt;/source&amp;gt;&lt;/div&gt;</summary>
		<author><name>Admin</name></author>	</entry>

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