$\"\"$

The function $\"\"$ .

Theorem :

Any trigonometric function is continuous at every number on its domain.

$\"\"$

Consider $\"\"$ and $\"\"$ .

The domain of the trigonometric function $\"\"$ is $\"\"$ and it is continuous in its domain.

The domain of polynomial function $\"\"$ is $\"\"$ and it is continuous in its domain.

Domain :

All possible values of $\"\"$ is the domain of the function.

The domain of $\"\"$ is $\"\"$ .

The function $\"\"$ is continuous at every number in its domain.

Domain of the function $\"\"$ is $\"\"$ .

$\"\"$

Domain of the function is $\"\"$ .