NAME
	tan - compute tangent

SYNOPSIS
	float tan(float x)


DESCRIPTION
	Return the tangent of the argument.

ERRORS
	An error will result if the argument is too large to accurately
	compute the tangent (around 1e9).

SEE ALSO
	kfun/cos, kfun/sin

NOTE
	For values close to a multiple of PI/2, the result may be inaccurate.