The function is $\"\"$ .

Period of $\"\"$ function is from $\"\"$ .

So, the function $\"\"$ takes the values from $\"\"$ .

But the function $\"\"$ takes the values from $\"image\"$ .

So, the function $\"\"$ takes the values from $\"image\"$

The graph of two cycles of $\"\"$ is

Observe the graph, y - intercept of $\"\"$ is zero (0).