ANSWER
[tex]y = \sin(x) [/tex]
EXPLANATION
The trigonometric function that is zero at integral values is the sine function.
That is;
[tex]y = \sin(x) [/tex]
has x-intercepts at
[tex] n\pi[/tex]
where n is an integer.
In other words, the solution to the equation:
[tex] \sin(x) = 0[/tex]
is
[tex]x = n\pi[/tex]
where n is an integer.
