\
The integral is
.
\
Apply pythagorean identity:
.
\
.
\
\
.
\
.
\
.
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.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=2a70a0de5bc53e0a02ac8e018d9dc149.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=21e37a55115a060ba2e0b9a876efd992.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=6d72586fbda64677ef75def7749915f0.png\")
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.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e71ecdd64ce6641c4e70c1a8672363f3.png\")
. ![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e71ecdd64ce6641c4e70c1a8672363f3.png\")
.