package guangzhaowei;

import java.util.Scanner;

public class Triangle {
    public static void angle(){
		Scanner sc= new Scanner(System.in);
    	System.out.println("三角函数类型：");
		String b=sc.next();
		System.out.println("数值：");
		double a=sc.nextDouble();
    	double c = Math.toRadians(a);
        if (a % 180 == 0 && b.equals("sin")) {
            System.out.println("运算结果是0");
        }
        if (a % 90 == 0 && a % 180 != 0 && b.equals("cos")) {
        	System.out.println("运算结果是0");
        }

        switch (b) {
            case "cos":
               System.out.println("运算结果是"+Math.cos(c));
               break;
            case "sin":
            	System.out.println("运算结果是"+Math.sin(c));
            	break;
            case "tan":
            	System.out.println("运算结果是"+Math.tan(c));   
            	break;
            case "cot":
            	System.out.println("运算结果是"+1 / Math.tan(c)); 
            	break;
        }
    }
}