$\"\"$

\

The functions are f (x) = 2cos 2x and g (x) = $\"\"$ .

\

Let f (x) and g (x) on the same set of co - ordinate axes

\

The function f (x) = 2cos 2x.

\

Compare the function with y = a cos bx.

\

a = 2 and b = 2.

\

Amplitude : $\"\"$ .

\

Period = $\"\"$ .

\

The key points over the interval $\"\"$ are $\"\"$

\

$\"\"$

\

The function g (x) = $\"\"$ .

\

Compare the function with y = a cos bx.

\

$\"\"$ \ \

\

Amplitude : $\"\"$ .

\

Period = $\"\"$ .

\

The key points over the interval $\"\"$ are $\"\"$

\

$\"\"$

\

The graphs of the two functions shown below:

\

$\"graph_by_trigonometryvalues_f(x)=2cos2xg(x)=-cos(4x).gif\"$ $\"\"$

\

The graphs of the functions f (x) = 2cos 2x and g (x) = $\"\"$ on the same set of co - ordinate axes is :

\

$\"graph_by_trigonometryvalues_f(x)=2cos2xg(x)=-cos(4x).gif\"$