Draw the graph of each of the following functions:
2cos 3x
To draw the graph of the curve 2cos(3x) assume some standard angle measures which will help in locating the points and drawing the curve.
X | π | |||||
2cos(3x) | 0 | -2 | 0 | -2 | 0 | 2 |
Therefore, the graph of curve 2cos(3x) can be drawn as
Here, the amplitude and frequency of the function cos(x) is increased by 2 and 3 times respectively.