Maybe nothing crazy happens, so let's just try it out. If we try to do x equals 0, what happens? We get 2 sine of 0, which is 0, minus sine of 2 times 0. That's going to be sine of 0 again, which is 0. So our numerator is going to be equal to 0. Sine of 0, that's 0, and then we have another sine of 0 there, so all 0s. And our denominator, we're going to have a 0 minus sine of 0.