We were tasked to find the 100kHz magnitude component of a non linear device with a function $$V_{out}=5V_{in}^{2}$$ where $$V_{in}=cos(1000\cdot 2\pi\cdot t)+sin(1000002\pi\cdot t)$$.

So far I have,

And now I have no idea where will I find the 100kHz component. Do I turn the frequency (Hz) to period (s) so I can insert it into t?

Any hints will be greatly appreciated, thank you very much!