.class error in program

Question

I keep getting an error on the lines with factorial(term). Not sure if I am writing that part correctly. I am trying to write an expression representing sin and cosine using a while loop for sin and do-while for cos. I have my results set up to print in another class. Any advice would be great.
public class NewMath
* computeSin uses the power series to compute the sin of x;
* @return sin(x)
* @param x is the angle in radians
public static double computeSin(double x)
double result = x;
// WHILE LOOP
int term= 3;
int sign= 1;
double numerator = Math.pow(x , term);
double denominator = factorial(int term);
while((numerator < Double.POSITIVE_INFINITY) && (denominator < Double.POSITIVE_INFINITY)){
result = result + Math.pow(x,term) / ( factorial(term)) * sign;
term = term + 2;
sign = -1 * sign;
return result;
* computeCos uses the power series to compute the cos of x;
* @return cos(x)
* @param x is the angle in radians
public static double computeCos(double x)
double result = 1;
//DO-WHILE loop
int term= 2;
int sign= 1;
double numerator = Math.pow(x , term);
double denominator = factorial(int term);
do{result= result + Math.pow(x, term) / (factorial(term) * sign);
                  term= term + 2;
                  sign = -1 * sign;  
while((numerator < Double.POSITIVE_INFINITY) && (denominator < Double.POSITIVE_INFINITY));
return result;
private double factorial(int x) {
if (x <= 1) return 1.0;
else return x * factorial(x - 1);
}

Answer 1

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