libm.info: tan

Go forward to tanh
Go backward to sqrt
Go up to Math
Go to the top op libm

`tan', `tanf'--tangent

*Synopsis*
     #include <math.h>
     double tan(double X);
     float tanf(float X);
   *Description*
`tan' computes the tangent of the argument X.  Angles are specified in
radians.
   `tanf' is identical, save that it takes and returns `float' values.
*Returns*
The tangent of X is returned.
*Portability*
`tan' is ANSI. `tanf' is an extension.