Simplifying a trigonometric equation

I want to simply the following without use of a calculator: $\displaystyle \frac{2 \tan⁡64°}{1-\tan^2⁡64°}$

At first I thought that this is tangent double angle identity = $\tan(2\times 64°)$

hence $=\tan(128°)$

Is that all? Really?

-

$\displaystyle Yup,\ that's\ it.$
Yes, you are correct, $$\displaystyle \frac{2 \tan⁡x}{1-\tan^2x} = Tan 2x$$. The given problem is absolutely in the given format. Therefore, you directly use this principle to get the required solution that you have already got.