C Tutorial/math.h/tan

tan

Item Value Header file math.h Declaration float tanf(float arg);double tan(double arg);long double tanl(long double arg); Return returns the tangent of arg. Parameter The value of arg must be in radians.

<source lang="cpp">#include <math.h>

 #include <stdio.h>
 int main(void)
 {
   double val = -1.0;
   do {
     printf("Tangent of %f is %f.\n", val, tan(val));
     val += 0.1;
   } while(val<=1.0);
   return 0;
 }</source>