public static Factor Get(string function, Factor input)
{
if (function == "tan")
{
var sin = Get("sin", input);
var cos = Get("cos", input);
if (sin != null && cos != null)
{
try
{
return new ExpressionFactor(new SingleComponentExpression(new ComponentList(new List<ComponentListFactor>
{
new ComponentListFactor(sin),
new ComponentListFactor(cos, false)
})).Evaluate());
}
catch (DivideByZeroException)
{
return Factorizer.ToFactor(new UndefinedExpression());
}
}
}
var identity = Identities.FirstOrDefault(i => i.Function == function && i.Input.Equals(input));
return identity?.Output;
}
internal SingleFactorComponent(Factor factor)
{
Factor = factor;
}
private static Component ToComponent(Factor factor)
{
return factor is ExpressionFactor
? ToComponent(((ExpressionFactor)factor).Expression)
: new SingleFactorComponent(factor);
}
public ComponentListFactor(Factor factor, bool isInNumerator = true)
{
Factor = factor;
IsInNumerator = isInNumerator;
}
public TrigonometricIdentity(string function, Factor input, Factor output)
{
Function = function;
Input = input;
Output = output;
}
private static Expression ToExpression(Factor factor)
{
return factor is ExpressionFactor
? ToExpression(((ExpressionFactor)factor).Expression)
: new SingleComponentExpression(new SingleFactorComponent(factor));
}
internal DualFactorComponent(Factor leftFactor, Factor rightFactor, bool isMultiply)
{
IsMultiply = isMultiply;
LeftFactor = leftFactor;
RightFactor = rightFactor;
}
private static Factor ToFactor(Factor factor)
{
return factor is ExpressionFactor
? ToFactor(((ExpressionFactor)factor).Expression)
: factor;
}
