public void ExpressionBase_Evaluation_Cos_x()
{
var expression = new Cos("x");
Assert.AreEqual(0.87758256189, expression.Evaluate(_replacements), 0.00000000001);
}
public void ExpressionBase_Evaluation_Cos()
{
var expression = new Cos(0);
Assert.AreEqual(1, expression.Evaluate(_replacements));
}