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Q.The function f(x)=tan⁡−1(sin⁡x+cos⁡x)f(x) = \tan^{-1}(\sin x + \cos x) is increasing in

a
(−π/4,π/4)(-\pi/4, \pi/4)
b
(0,π/2)(0, \pi/2)
c
(−π/2,π/2)(-\pi/2, \pi/2)
d
R\mathbb{R}

Correct Answer: Option A

The correct solution involves applying the fundamental concept to derive the final value step by step...

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