Let the function f:R→R be defined by f(x)=cos x,∀x∈R. Show that – InterviewSolution

1.	Let the function f:R→R be defined by f(x)=cos x,∀x∈R. Show that f is neither one-one nor onto.
Answer» Let the function $f : R \to R$ be defined by $f (x) = c o s x, \forall x \in R$ . Show that $f$ is neither one-one nor onto.

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