\
Find
.
\
The function is
and
.
\
Quotient identity :
.
\
Pythagorean identity :
.
\
\
Option
H
is correct.
\
\
Option
H
is correct.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
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and ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=94a5089ffb77e3e1f24d5b18fb4e0fe6.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ac4c009551848514c351ecd3e2a20c76.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=d40aa2a255b34e781c9692f5cceda491.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a0c8f3d3fd27841a7088a32052ec74ed.png\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")