[tex]\bf tan(\theta)=\cfrac{sin(\theta )}{cos(\theta)}\\\\
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tan(A)=\cfrac{\stackrel{sin(A)}{\frac{3}{5}}}{\stackrel{cos(A)}{\frac{4}{5}}}\implies tan(A)=\cfrac{3}{\underline{5}}\cdot \cfrac{\underline{5}}{4}\implies tan(A)=\cfrac{3}{4}[/tex]
