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  3. 11th Class
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11th Class Mathematics Sample Paper Mathematics Sample Paper-3

  • question_answer
    arg \[\left[ \frac{1+\cos \frac{\pi }{8}+i\sin \frac{\pi }{8}}{1-\cos \frac{\pi }{8}+i\sin \frac{\pi }{8}} \right]\] is equal to

    A)  \[\frac{3\pi }{4}\]                     

    B)  \[-\frac{3\pi }{8}\]         

    C)  \[-\frac{3\pi }{4}\]          

    D)  None of these

    Correct Answer: B

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