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JEE Main & Advanced Mathematics Trigonometric Identities Question Bank Numerical Value Type Questions - Trigonometric Ratios

  • question_answer
    If \[\alpha \] is the root of \[25\,{{\cos }^{2}}\theta +5\,\,\cos \theta -12=0,\] \[\pi /2<\alpha <\pi ,\] then find the value of \[\sin \,\,2\alpha \] is \[\frac{-k}{25}\] then find k.

    Answer:

    24.00


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