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The frequency of sinusodial wave y = 0.40 cos [2000 t + 0.80] would be

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c cos [2000 t + 0.80] would be

(a) 1000π Hz

(b) 2000 Hz

(c) 20 Hz

(d) 1000/π Hz

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1 Answer

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by (81.4k points)

Correct option (d) 1000/π Hz

Explanation:

Compare with the equation. y = acos (2πvt +ϕ) this give 2πv = 2000

v = 1000/π Hz

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