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.


1