tan() and tanf()

  #include <math.h>

  

  double tan(double x);

  

  float  tanf(float x);

  

tan() computes the tangent of x. Express x in radians.

tan(x). If x is an odd multiple of Pi/2, it returns infinity and sets errno to EDOM.

acos() and acosf(),

asin() and asinf(),

atan() and atanf(),

atan2() and atan2f(),

cosh() and coshf(),

sin() and sinf(), and

tan() and tanf()