PHP atan function

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atan

(PHP 3, PHP 4, PHP 5)

atan — Arc tangentDescriptionfloat atan ( float arg )

Returns the arc tangent of arg in radians.
atan() is the complementary function of
tan(), which means that
a==tan(atan(a)) for every value of a that is within
atan()’s range.

See also:
atanh(),
asin(), and
acos().

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Published:
2.26.07 / 1am
Category:
PHP Functions
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