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What is the period of the signal: 2cost/6?

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in Signals and Systems by (1.2m points)
What is the period of the signal: 2cost/6?

(a) 8π

(b) 16π

(c) 12π

(d) 10π

This question was addressed to me during a job interview.

My doubt is from Periodic Signals in portion Fourier Series of Signals and Systems

1 Answer

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by (42.1k points)
Right choice is (c) 12π

The best explanation: Comparing the above signal with the standard form Acos2πFt, where A is the amplitude and F is the frequency,

We get, 2πF=⅙

So, F= 1/12π

Hence, t= 12π.

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