![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
From the diagram opposite side 17.8 the missing legth is adjecent to the angle measuring ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=d6b435aed7a84f566082200f67ea3564.png\")
and hypotenuse is x.
The trigonometric function relating opposite side of a triangle and then opposite side is sin function.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=aa0855108473ae5a1d8bbe37733df2dd.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=40384a18f119e51ae81e92fa090191df.png\")
(Substitute ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=626b0a4d46fcc8159076a38e3d9fa636.png\")
)
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=cb44e27f9a32409aed39a67e383b02d7.png\")
Apply cross product property ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=4a768eb71c3beb8a2b4c32e7be25eb53.png\")
then ad = bc.
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c1782b95edda1e959167f674d5bf9789.png\")
Divide each side by 0.809.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=41b948edfed3a91aaa70374df5eee909.png\")
\
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=2a25041dd0edacc35ae8b9b53408f666.png\")
\
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The value of x is 22.