Question

integrate xcos2x dx from 0 to pi/2

Answer 1

1) http://www.wolframalpha.com/input/?i=integrate+x+cos%282x%29+dx+from+0+to+pi%2F2
2) http://www4e.wolframalpha.com/Calculate/MSP/MSP64001a2i02d54dgd1ed9000042gbhf9ac6a832fb?MSPStoreType=image/gif&s=1&w=432&h=397

Answer 2

thank you...i tried wolfram but didnt know how to get the intermediary steps...thanks!

Answer 3

let's see what i get exactly when i put this into WA
http://www.wolframalpha.com/input/?i=integrate+xcos2x+dx+from+0+to+pi%2F2
suggestion: try using brackets after funtion

Answer 4

*function