I want add sin cos tan pow please help me

Question

// Created by Dark light

import java.util.Scanner;
public class calculater {
public static void main(String[ ] args) {
Scanner input=new Scanner (System .in);
System .out.println ("Enter 1st num");
int a=input.nextInt();

System .out.println ("Enter operation");

String op=input.next();
System .out.println ("Enter 2stnum");
int b=input.nextInt();

//int z;
if(op.equals("+")){
System.out.println(a+b);
}

else if(op.equals("-")){
System.out.println(a-b);
}
else if(op.equals("*")){

System.out.println(a*b);
}
else if (op.equals("/")){
System.out.println(a/b);
}
//System .out.println ("The result is"+ z);

}
}

Answer 1

You could do something like this:
import java.util.Scanner;
public class calculater {
private static boolean isOneOperandOperation(String op) {
return op.equals("sin") || op.equals("cos") || op.equals("tan");
}

public static void main(String[ ] args) {
Scanner input=new Scanner (System .in);
System .out.println ("Enter 1st num");
int a=input.nextInt();

System .out.println ("Enter operation");

String op=input.next();
if (isOneOperandOperation(op)) {
// convert a from degrees to radians.
double angleInRadians = a * Math.PI / 180;
if (op.equals("sin"))
System.out.println(Math.sin(angleInRadians));
else if (op.equals("cos"))
System.out.println(Math.cos(angleInRadians));
else
System.out.println(Math.tan(angleInRadians));
}
else {
System.out.println ("Enter 2stnum");
int b=input.nextInt();

if(op.equals("+")){
System.out.println(a+b);
}
else if(op.equals("-")){
System.out.println(a-b);
}
else if(op.equals("*")){
System.out.println(a*b);
}
else if (op.equals("/")){
System.out.println(a/b);
}
else if (op.equals("pow")){
System.out.println(Math.pow(a, b));
}
}

}
}

Answer 2

Dark Light please don't ask the same question multiple times
https://www.sololearn.com/discuss/2688736/?ref=app