Question

Determine the Time period of: x(t)=3 cos⁡(20t+5)+sin⁡(8t-3).

(a) 1/10 sec

(b) 1/20 sec

(c) 2/5 sec

(d) d 2/4 sec

The question was asked in a dream while sleeping

Origin of the question is Signal Classification and Properties in section Signals and Systems Basics of Signals and Systems

Answer 1

Correct choice is (c) 2/5 sec

The explanation is: Here is the explanation.