12th Class Mathematics Continuity and Differentiability

  • question_answer 139) If x = a (cos t + t sin t) and y = a (sin t ? t cos t), find  

    Answer:

    x = a (cos t + t sin t)             = a t cos t       and y = a (sin t ? t cos t)             = a(cos t + t sin t ? cos t) = a t sin t             Diff. w.r.t. x        


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