1.

\(x\left( t \right) = \frac{1}{{{T_0}}} + \mathop \sum \limits_{k = 1}^N \frac{2}{{{T_0}}}cosk{\omega _0}t\) is the combined trigonometric form of Fourier series for:

A. Half rectified wave
B. Saw-tooth wave
C. Rectangular wave
D. Impulse train
Answer» E.


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