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6 Answers
skygirl
·2009-01-06 09:28:45
write it like √sinx(cos4x)cosxdx
cos4x= [1-sin2x]2
then put sinx=t => cosxdx=dt.
bus :)
Subash
·2009-01-10 09:51:50
Starting my thanksgiving mission
thanks to all who helped me with the problem