Ka0kz1enejoneah Ka0kz1enejoneah
  • 11-11-2016
  • Mathematics
contestada

Find the differential dy for y =cos(pix) and evaluate it x=1/3 and dx=-.02 and round your results to 3 decimal places.

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Nirina7
Nirina7 Nirina7
  • 16-11-2016
dy / dx = - Pi sin (Pix), so dy = - Pi sin (Pix) dx, for x = 1/3, and dx = -0.2
we get dy = - Pi x sin Pi/3 x (-0.2) = 3.14 x 0.2 x 0.86=0.543
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