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The function f(x)=(sinx+cosx) is an incr...

The function `f(x)=(sinx+cosx)` is an increasing function in

A

`(0,pi/2)`

B

`(-pi/2,pi/2)`

C

`(pi/4,pi/2)`

D

`(-pi/2,pi/4)`

Text Solution

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The correct Answer is:
D
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