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 v2

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Tan.java

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package symjava.symbolic;

import symjava.symbolic.arity.UnaryOp;

import symjava.symbolic.utils.Utils;

public class Tan extends UnaryOp {

public Tan(Expr arg) {

super(arg);

label = "tan(" + arg + ")";

sortKey = label;

}

@Override

public Expr diff(Expr expr) {

return arg.diff(expr).multiply(new Pow(this, Expr.valueOf(2)).add(1));

}

public static Expr simplifiedIns(Expr expr) {

return new Tan(expr);

}

@Override

public Expr simplify() {

return this;

}

@Override

public boolean symEquals(Expr other) {

if(other instanceof Tan) {

return Utils.symCompare(this.arg, ((Tan) other).arg);

}

return false;

}

}