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cos() 方法返回指定 double 值的余弦。
double cos(double d)
d - 此方法接受 double 数据类型的值。
方法返回指定 double 值的余弦。
public class Main { public static void main(String args[]) { double degrees = 45.0; double radians = Math.toRadians(degrees); System.out.format("The value of pi is %.4f%n", Math.PI); System.out.format("The cosine of %.1f degrees is %.4f%n", degrees, Math.cos(radians)); } }
上面示例编译运行结果如下
The value of pi is 3.1416
The cosine of 45.0 degrees is 0.7071