Question

Sketch the graph of the following curves on the same scale and the same axes:

\[y = \cos x\text{ and }y = \cos\frac{x}{2}\]

Answer 1

First, we draw the graph of y = cos x.
Let us now draw the graph of \[y = \cos\left( \frac{x}{2} \right)\]
\[\Rightarrow y = \cos\frac{1}{2}\left( x \right)\]
 Then, we will obtain the following graph: