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SSC SSC CHSL TIER-I Solved Paper Held on 10.01.2017

  • question_answer
    \[\cot \left( \frac{11\pi }{6} \right)\]is equal to

    A) \[-\sqrt{3}\]                               

    B)  \[\frac{1}{\sqrt{3}}\]

    C)  \[\frac{-1}{\sqrt{3}}\]                           

    D)  \[\sqrt{3}\]

    Correct Answer: D

    Solution :

     \[\cot \left( -\frac{11\pi }{6} \right)\] \[=-\cot \frac{11\pi }{6}=-\cot \left( 2\pi -\frac{\pi }{6} \right)\] \[=\cot \frac{\pi }{6}=\sqrt{3}\] \[[cot(-\theta )=-cot\theta ;cot(2\pi -\theta )=-cot\theta ]\]


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