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If A = { x : (-2)/(5) le x le (pi-2)/(5)...

If `A = { x : (-2)/(5) le x le (pi-2)/(5)}, B = { y : - 1 le y le 1}` and `f(x)= cos (5x+2)` then the mapping `f: A rarr B` is

A

One-one but not onto.

B

onto but not one-one.

C

Both one-one and onto

D

Neither one-one nor onto

Text Solution

Verified by Experts

The correct Answer is:
C
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