$\"\"$

The function is $\"\"$ .

Find the amplitude and period of the function.

The general form of cosine function is $\"y$ .

Where $\"\"$ is amplitude and period $\"\"$ .

Compare the function with general form of cosine function.

Here amplitude $\"\"$ .

The period is $\"\"$ .

The amplitude of the function is $\"\"$ .

The period of the function is $\"\"$ .

$\"\"$

The amplitude of the function is $\"\"$ .

The period of the function is $\"\"$ .