Let f(x) = sin x + cos x + tan x = aec...

Let ` f(x) = sin x + cos x + tan x = aec sin x = arc cos x + arc tan x. ` If M and m are maximum and minimum values of f(x). Then their arithmetic mean is equal to

A

`pi`

B

`pi/2`

C

`2pi`

D

`(3pi)/2`

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The correct Answer is:

C

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