Fun with infinite sets

Geometry Level 1

Imagine the graph of function \(f(x)=\sin(x)\). The domain of this function is the set of all real numbers \(R\).

Consider the three sets
\(A=\left\{ x\in \mathbb R|\sin(x)=-1 \right\}\),
\(B=\left\{ x\in \mathbb R|\sin(x)=0 \right\}\) and
\(C=\left\{ x\in \mathbb R|\sin(x)=1 \right\}\).

Which of them has the largest cardinality?

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