diff --git a/d.java b/d.java
new file mode 100644
index 0000000..ed92315
--- /dev/null
+++ b/d.java
@@ -0,0 +1,15 @@
+public class sanjiaohanshu {	
+		public static void intox(double x,int n) {
+			//x±íʾ¶ÈÊý
+			double pi=Math.PI;
+			double a=x*(pi/180);
+			switch(n){
+			case 1:
+				System.out.println(Math.sin(a));break£»//sinx
+			case 2:
+				System.out.println(Math.cos(a));break£»//cosx
+			case 3:
+				System.out.println(Math.tan(a));break£»//tanx		
+			}
+}
+}
\ No newline at end of file