Signals and Sinusoids

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Questions and Answers

Which mathematical concept can be used to express these signals in terms of sinusoids?

  • Taylor series
  • Quadratic equation
  • Pythagorean theorem
  • Euler's formula (correct)

How can these signals be expressed in terms of sinusoids using Euler's identity?

  • e±j1
  • e±j4 (correct)
  • e±j2
  • e±j0

What is the relationship between Euler's identity and sinusoids?

  • Euler's identity cannot be used to represent sinusoids
  • Euler's identity is used to represent sinusoids (correct)
  • Euler's identity is unrelated to sinusoids
  • Euler's identity is a special case of sinusoids

Which variable represents the sample number in the expression for a discrete-time sinusoidal signal?

<p>n (B)</p> Signup and view all the answers

Which variable represents the frequency in radians per sample in the expression for a discrete-time sinusoidal signal?

<p>co (B)</p> Signup and view all the answers

If the frequency variable 'f' is used instead of 'co', how would the expression for a discrete-time sinusoidal signal change?

<p>x(n) = A cos(2nf + 8) (C)</p> Signup and view all the answers

What are the dimensions of the frequency variable 'f' in the expression for a discrete-time sinusoidal signal?

<p>Cycles per second (C)</p> Signup and view all the answers

In the context of sampling analog sinusoids, how is the frequency variable 'f' related to the frequency 'F' of the analog sinusoid?

<p>f = 2Ï€F (A)</p> Signup and view all the answers

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