第1个回答 2010-09-04
math.h 和C一样调用。
程序:
sin
Summary #include <math.h>
float sin (float x); /* value to calculate sine for */
Description The sin function calculates the sine of the floating-point value x. The value of x must be in the -65535 to +65535 range or an NaN error value is generated.
Return Value The sin function returns the sine of x.
See Also cos, cos517, sin517, tan, tan517
Example
#include <math.h>
#include <stdio.h> /* for printf */
void tst_sin (void) {
float x;
float y;
for (x = 0; x < (2 * 3.1415); x += 0.1) {
y = sin (x);
printf ("SIN(%f) = %f\n", x, y);
}
}
注:角度不是用度算的,以弧度为单位本回答被提问者和网友采纳