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JEE Main & Advanced Mathematics Inverse Trigonometric Functions Question Bank Inverse trigonometric functions

  • question_answer
    \[\cos \text{ }\left[ {{\cos }^{-1}}\text{ }\left( \frac{-1}{7} \right)+{{\sin }^{-1}}\text{ }\left( \frac{-1}{7} \right) \right]=\]  [EAMCET 2003]

    A) \[-1/3\]

    B) 0

    C) \[1/3\]

    D) \[4/9\]

    Correct Answer: B

    Solution :

      \[\cos \left\{ {{\cos }^{-1}}\left( \frac{-1}{7} \right)+{{\sin }^{-1}}\left( \frac{-1}{7} \right) \right\}=\cos \frac{\pi }{2}=0\].


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