A function is given by f(t) = sin2t + cos 2t. Which of the following is true?
A. $$f$$ has frequency components at 0 and $${1 \over {2\pi }}Hz$$
B. $$f$$ has frequency components at 0 and $${1 \over \pi }Hz$$
C. $$f$$ has frequency components at $${1 \over {2\pi }}$$ and $${1 \over \pi }Hz$$
D. $$f$$ has frequency components at 0, $${1 \over {2\pi }}$$ and $${1 \over \pi }Hz$$
Answer: Option B
This Question Belongs to Electronics And Communications Engineering >> Signal Processing
The Fourier transform of a real valued time signal has
A. Odd symmetry
B. Even symmetry
C. Conjugate symmetry
D. No symmetry
A. $$V$$
B. $${{{T_1} - {T_2}} \over T}V$$
C. $${V \over {\sqrt 2 }}$$
D. $${{{T_1}} \over {{T_2}}}V$$
A. $$T = \sqrt 2 {T_s}$$
B. T = 1.2Ts
C. Always
D. Never
A. $${{\alpha - \beta } \over {\alpha + \beta }}$$
B. $${{\alpha \beta } \over {\alpha + \beta }}$$
C. α
D. β
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