Two sinusoidal signals have the same amplitude (A) and the same frequency (f) . They differ in phase by 180 degrees. If these two signals are added together, the result is a sinusoidal signal having an amplitude of:
A) Zero
B) 0.707A and a frequency of f
C) A and a frequency of 2f
D) 2A and a frequency of f
E) 2A and a frequency of 2f
Correct Answer:
Verified
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