The trigonometry identity is .
(Pythagorean Identity: )
(Apply formula : ) \ \
(Simplify) \ \
.
The identity is verified.
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=79c134481146ee99d495cbe54973c678.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=bd2071a166f44be29bf95039045dc5b4.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7e17d73bb22d623b85a565cfee824a68.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=04464004501fcd74c62826b83f17cf5d.png\")
(Pythagorean Identity: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f9ed2b3404224556b4257374b417a984.png\")
)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f4c058157b2e146e2df3e6693b09a6f3.png\")
(Apply formula : ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=88549c722bc06f24e05aa86611a63934.png\")
) \ \
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=35e6eab98561db06600a63ce55e2675f.png\")
(Simplify) \ \
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=62793c880398c1d71dc270b99b6788d0.png\")
.![\"\"](\"/userfiles/image/steps_images/solution.JPG\")