# Lecture 1B Questions

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Please answer the following questions after watching lecture 1B.

The following plot shows the signal x[n]=A\cos(\Omega n):

Answer the following questions about this signal:

Find the base-band frequency \Omega of x[n]. Enter your answer as a Python expression. You may assume that

\Omega =~

`e`

, `pi`

, and other common mathematical constants are defined for you.\Omega =~

Find another valid value of \Omega such that \pi\leq \Omega\leq 2\pi and enter it in the box below:

\Omega =~

\Omega =~

Find another valid value of \Omega such that 2\pi\leq \Omega\leq 3\pi and enter it in the box below:

\Omega =~

\Omega =~