Which of the following functions is odd?

f (x)= cosx

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none of these

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Solution

The correct option is D none of these
Option (d)

The function f(x) is said to be 'odd' if and only if f(x) is a real-valued function of a real variable x, and f(- x) = - f(x). None of the options satisfies , f(-x)= -f(x), hence answer option d.

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