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12th Class Mathematics Sample Paper Maths Olympiad Model Paper-6

  • question_answer
    The function \[f(x)=ta{{n}^{-1}}(\sin \,x+\cos \,x)\] is an increasing function in

    A)  \[(\pi /4,\pi /2)\]             

    B)  \[(-\pi /2,\pi /4)\]

    C)  \[(0,\,\,\pi /2)\]              

    D)  \[(-\pi /2,\pi /2)\]

    E)  None of these

    Correct Answer: B

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