![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
If a person standing at a ridge of a Grand Canyon, that person see the cliff of a Grand Canyon at an angle ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=401dfc03d5a8a06a3a1afbe88b95cc4f.png\")
.
Draw a diagram represents the above situation.
\![\"\"](\"/userfiles/517-9.gif\")
We can find the width of the Grand Canyon by using the tangent angle.
\Trigonometric function : ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=17c525d922b1fabf9bfed40c2cb34cb1.png\")
.
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f1b8c9a9e5bd6d60985afe2a597673bb.png\")
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ed1d76da4a50a62886f4ca8f9d94615e.png\")
.