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If f : R to R is a runction defined by f...

If `f : R to R` is a runction defined by `f (x) = sin x,` then which of the following is true ?

A

f is 1-1 but not onto

B

f is onto but not 1-1

C

f is both 1-1 and onto

D

f is neither 1-1 nor onto

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