Question

.The function f, defined by f(x) = cosx +sinx,

is an odd function.or not​

Answer 1

Answer:

f(x) = cos x + sin x

f(-x) = cos (-x) + sin(-x) = cos x - sinx

For any function f to be called odd, it must satisfy f(-x) = -f(x)

However this is not true here.

Hence it's not an odd function.