![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
The trigonometric function is ![\"fraction](\"http://www.wiris.com/demo-aspx/pluginwiris3/fckeditor_wiris/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.aspx?formula=56d98a65874d4d5b89d414aa1e2532e9.png\")
.
= ![\"fraction](\"http://www.wiris.com/demo-aspx/pluginwiris3/fckeditor_wiris/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.aspx?formula=1368ce519206ff73f4c7625943240fb1.png\")
(Using formula: ![\"open](\"http://www.wiris.com/demo-aspx/pluginwiris3/fckeditor_wiris/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.aspx?formula=afbdf96670665ef246594c675fda2ed0.png\")
)
Apply pythagorean identity: ![\"Syntax](\"http://www.wiris.com/demo-aspx/pluginwiris3/fckeditor_wiris/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.aspx?formula=c9ede320035fe6789c7dc863995f6d10.png\")
.
= ![\"fraction](\"http://www.wiris.com/demo-aspx/pluginwiris3/fckeditor_wiris/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.aspx?formula=febd87fa2c63fa66298f11f8e537624e.png\")
Apply commutative property of addition: a + b = b + a.
\= ![\"fraction](\"http://www.wiris.com/demo-aspx/pluginwiris3/fckeditor_wiris/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.aspx?formula=ef2941ab1a2d9272c324bb636fc88f77.png\")
= ![\"fraction](\"http://www.wiris.com/demo-aspx/pluginwiris3/fckeditor_wiris/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.aspx?formula=60dd0d26a0e59326f188cbc49ba9f844.png\")
(Simplify)
= 2 (Simplify) ![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
The solution is 2.