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Question

Find the area bounded by the y-axis and the curve x = eysinπy,y = 0,y = 1.

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Solution

10eysin(πy)dy

apply integration by parts: u=ey,v=sin(πy)

=e+1π101πeycos(πy)dy

=e+1π(1π10eycos(πy)dy)

apply integration by parts: u=ey,v=cos(πy)

=e+1π(1π(010ey1πsin(πy)dy))

=e+1π(1π(01π10eysin(πy)dy))

10eysin(πy)dy=e+1π(1π(01π10eysin(πy)dy))

=πe+ππ2+1

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