atan() problem! help!

[anm]

$paren = deg2rad( $paren );
$paren = atan( $paren );
echo $paren;

deg2rad() converts degrees to radians. What I want is the arc tangent (inverse tangent) of $paren in degrees. It should work, but it isn't. . .what's wrong?
So if $paren = "1" it should output 45 (according to my graphing calculator) but it isn't. . .anyone see something wrong?

[dewen]

$paren = 1;
$paren = atan( $paren );
$paren = rad2deg( $paren );
echo $paren;

worked for me

[anm]

Thanks so much!

Yeah, atan() works the opposite from tan() and cos() and I was writing it as working the same way as them!

Thanks again! 😃