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Unformatted text preview: c 4. x cos( x ) dx (Hint: Use integration by parts and show your work) u = x dv = cos( x ) dx du = dx v = sin( x ) = x sin( x ) -sin( x ) dx = x sin( x ) + cos( x ) + c EXTRA CREDIT (2 pts) Evaluate the following integral x e x dx Rewrite: xe-x dx u = x dv = e-x dx du = dx v = -e-x = -xe-x + e-x dx = -xe-x-e-x + c...
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