11th Class Mathematics Sample Paper Mathematics Olympiad - Sample Paper-12

  • question_answer If a sec \[\alpha -c\]tan \[\alpha =d\]and b sec \[\alpha +d\]tan\[\alpha =c,\] then

    A)  \[ab=cd\]     

    B)  \[{{a}^{2}}+{{d}^{2}}={{c}^{2}}+{{b}^{2}}\]

    C)  \[{{a}^{2}}+{{c}^{2}}={{b}^{2}}+{{d}^{2}}\]

    D)     \[{{a}^{2}}+{{b}^{2}}={{c}^{2}}+{{d}^{2}}\]

    Correct Answer: D


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