Posted by olek on Friday, May 13, 2011 at 2:03pm.
Is it an answer on my question?
2cos^2(x)=1+cos(2x)
ydy=(2+cos(2x))dx integrating
y^2/2=2x+sin(2x)/2+C Find C
1/2=C
y=sqrt(4x+sin(2x)+1)
Thats right.
Thank you.
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