cos - return the cosine of a float

float cos( float f );

This efun is only available if PACKAGE_MATH is compiled into the driver.

Returns the cosine of its argument, `f', measured in radians.

See also:
 acos,
 asin,
 atan, 
 sin,
 tan

 Tim Hollebeek  Beek@ZorkMUD, Lima Bean, IdeaExchange, and elsewhere
