If $$x$$ is very very very small $$sin x » x$$. An operator $$S_n$$ is defined such that

$$S_n(x)= sin sin sin .... x $$(a total of $$n$$ $$sin$$ operators are included here). For

sufficiently large $$n$$, $$S_n(x) » S_(n-1)(x)$$. In that case, express cos $$(S_n(x))$$ as the

nearest rational value.