What is the frequency of f(theta)=sin2t-cos12t

What is the frequency of $f\left(\theta \right)=\mathrm{sin}2t-\mathrm{cos}12t$?
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tun1t2j
The period $\frac{2\pi }{2}=\pi$ of $\mathrm{sin}2t$ is
$6×$ (the period $\frac{2\pi }{12}=\frac{\pi }{6}$) of $\mathrm{cos}12t$.
So, the period for the compounded oscillation
$f\left(t\right)=\mathrm{sin}2t-\mathrm{cos}12t$ is $\pi$
The frequency $=1/\left(period\right)=\frac{1}{\pi }$