WMPRO, WMMINI FW >= 1.0 WMMEGA FW >= 2.0

Return cosine of a radian angle

$radian_angle: Angle in radians

Float: Cosine of angle

<pre><?
  $pi=3.14159;
  print(cos($pi)."\r\n");   // result is -1.000000
  print(cos($pi*2)."\r\n"); // result is  1.000000
?></pre>

sin() - Return sine of a radian angle