Consider the signal \[X\left( t \right) = \left\{ \begin{gathered}
2\cos \left( t \right) + \cos \left( {2t} \right);\,\,\,t < 0 \hfill \\
2\sin \left( t \right) + \sin \left( {2t} \right);\,\,\,t \leqslant 0 \hfill \\
\end{gathered} \right.\]
The signal X(t) is
A. periodic with period 2π
B. periodic with period π
C. non-periodic
D. periodic with period $$\frac{\pi }{2}$$
Answer: Option C
This Question Belongs to Electronics And Communications Engineering >> Signal Processing
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