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9th Class Mathematics Sample Paper Maths Olympiad Model Test Paper-3

  • question_answer
    If \[\frac{\sin \theta +cos\theta }{\sin \theta -\cos \theta }=3,\] then the value of \[{{\sin }^{4}}\theta -{{\cos }^{4}}\theta \] is

    A)  \[\frac{4}{3}\]                         

    B)  \[\frac{3}{4}\]

    C)  \[\frac{5}{3}\]                         

    D)  \[\frac{3}{5}\]

    E)  None of these

    Correct Answer: D

    Solution :

     Not Available


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