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标题:C库函数 sin()

C库函数 sin()

#include <stdio.h>

#include <math.h>



#define PI 3.14159265



int main () {

   double x, ret, val;

   x = 45.0;

   val = PI / 180;

   ret = sin(x*val);

   printf("The sine of %lf is %lf degrees", x, ret);



   return(0);

}

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