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  3. JEE Main & Advanced

JEE Main & Advanced Sample Paper JEE Main - Mock Test - 39

  • question_answer
    If \[\frac{\cos 5A}{\cos A}+\frac{\sin 5A}{\sin A}=a+b\cos 4A,\] then the value of \[(a+b)\] is ____.

    Answer:

    6


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