今天的作業是學習對應函數
public class Hello {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
double a,s,d,f,g,h,j,k,l,z,x;
a=Math.PI ;
s=Math.cos(0);
d=Math.cos(a/4);
f=Math.cos(a/2);
g=Math.cos(a/3);
h=Math.cos(2*a);
j=Math.sin(0);
k=Math.sin(a/4);
l=Math.sin(a/2);
z=Math.sin(a/3);
x=Math.sin(2*a);
System.out.println("a="+a);
System.out.println("s="+s);
System.out.println("d="+d);
System.out.println("f="+f);
System.out.println("g="+g);
System.out.println("h="+h);
System.out.println("j="+j);
System.out.println("k="+k);
System.out.println("l="+l);
System.out.println("z="+z);
System.out.println("x="+x);
}
}
跑出來的答案:
a=3.141592653589793
s=1.0
d=0.7071067811865476
f=6.123233995736766E-17
g=0.5000000000000001
h=1.0
j=0.0
k=0.7071067811865475
l=1.0
z=0.8660254037844386
x=-2.4492935982947064E-16
參考JAVA的網站: http://www.dreamdu.com/javascript/object_math/#triangle