Zero points of trigonometric function

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I am supposed to find zero points of function: $$\arctan\left ( \frac{x-1}{x} \right ) $$ Can anyone help me what is the stragety here? Am I supposed to just let y=0 and then x=0?

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$ \arctan(t)=0 \iff t=0.$ Hence

$$\arctan\left ( \frac{x-1}{x} \right )=0 \iff x-1=0 \iff x=1.$$