Question
Mathematics Question on Trigonometric Functions
Let f: R->R be defined by f(x) = cos x. Then
A
f is one-one and odd
B
f is odd but not one-one
C
f is even and onto
D
f is one-one and even
E
f is even but not onto
Answer
f is even but not onto
Explanation
Solution
The correct option is (E) : f is even but not onto