#7
[tex]\\ \tt\hookrightarrow cos47=\dfrac{x}{13}[/tex]
[tex]\\ \tt\hookrightarrow x=13cos47[/tex]
[tex]\\ \tt\hookrightarrow x=13(0.68)[/tex]
[tex]\\ \tt\hookrightarrow x=8.84[/tex]
#9
[tex]\\ \tt\hookrightarrow tan55=\dfrac{20}{x}[/tex]
[tex]\\ \tt\hookrightarrow x=\dfrac{20}{tan55}[/tex]
[tex]\\ \tt\hookrightarrow x=\dfrac{20}{1.42}[/tex]
[tex]\\ \tt\hookrightarrow x=14.1[/tex]
#10
[tex]\\ \tt\hookrightarrow tan32=\dfrac{18}{x}[/tex]
[tex]\\ \tt\hookrightarrow x=\dfrac{18}{tan32}[/tex]
[tex]\\ \tt\hookrightarrow x=\dfrac{18}{0.62}[/tex]
[tex]\\ \tt\hookrightarrow x=29.03[/tex]
#11
[tex]\\ \tt\hookrightarrow cosx=\dfrac{50}{29}[/tex]
[tex]\\ \tt\hookrightarrow cosx=0.58[/tex]
[tex]\\ \tt\hookrightarrow x=cos^{-1}(0.58)[/tex]
[tex]\\ \tt\hookrightarrow x=73.7[/tex]
#14
[tex]\\ \tt\hookrightarrow sinx=\dfrac{19}{22}[/tex]
[tex]\\ \tt\hookrightarrow sinx=0.8[/tex]
[tex]\\ \tt\hookrightarrow x=53.3[/tex]
