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10th Class Mathematics Sample Paper Maths Olympiad Model Test Paper-2

  • question_answer
    The value of \[{{\cos }^{2}}30{}^\circ {{\cos }^{2}}45{}^\circ +4{{\sec }^{2}}60\]\[+\frac{1}{2}{{\cos }^{2}}90{}^\circ -2{{\tan }^{2}}60{}^\circ \] is

    A)  \[\frac{10}{3}\]                                    

    B)  \[\frac{83}{8}\]

    C)  \[\frac{79}{8}\]                        

    D)  \[\frac{59}{9}\]

    E)  None of these

    Correct Answer: B

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