A mapping f: R-R which is defined as f(x)=cos x, x ER is | Quantitative Aptitude | SolveeIt | Solveeit

Today, August 24

Question

A mapping f: R-R which is defined as f(x)=cos x, x ER is

A

one- one only

B

onto only

C

neither one one nor onto

D

one one and onto

Answer

neither one one nor onto

Explanation

Solution

The correct option is(C): neither one one nor onto