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11th Class Mathematics Sample Paper Maths Olympiad Model Paper-9

  • question_answer
    If \[x+\frac{1}{x}=2\cos \theta ,\] then x is equal to

    A)  \[\cos \theta +i\,\,\sin \theta \]    

    B)  \[\cos \theta -i\,\,\sin \theta \]

    C)  \[\cos \theta \pm i\,\,\sin \theta \]

    D)  \[\sin \theta \,\,\pm i\,\,\cos \theta \]

    E)  None of these

    Correct Answer: C

    Solution :

     Not Available   


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