10th Class Mathematics Sample Paper Mathematics Sample Paper-6

  • question_answer If \[\mathbf{tanA}=\mathbf{n}\,\mathbf{tanB}\]and\[\mathbf{sin}\text{ }\mathbf{A}=\mathbf{n}\text{ }\mathbf{sinB}\], then find the value of\[\mathbf{co}{{\mathbf{s}}^{\mathbf{2}}}\mathbf{A}\].

    A) \[\frac{{{m}^{2}}+1}{{{n}^{2}}+1}\]         

    B) \[\frac{{{m}^{2}}+1}{{{n}^{2}}-1}\]

    C) \[\frac{{{m}^{2}}-1}{{{n}^{2}}+1}\]           

    D) \[\frac{{{m}^{2}}-1}{{{n}^{2}}-1}\]

    E) None of these

    Correct Answer: E


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