12th Class Mathematics Continuity and Differentiability

  • question_answer 106) If y = e6x cos 3x, find y2. 

    Answer:

    y = e6x cos 3x                                                                        + 36 e6x cos 3x.          = 27 e6x cos 3x ? 36 e6x sin 3x.          = 9e6x [3 cos 3x ? 4 sin 3x].  


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