In Triangle ABC, which trigonometric ratio has the value a/c?
A) tan A
B) cos A
C) tan C
D) cos C
E) sin C

we know that
In the right triangle ABC
[tex]sin(A)=\frac{BC}{AC}= \frac{a}{b}[/tex]
[tex]cos(A)=\frac{AB}{AC}= \frac{c}{b}[/tex]
[tex]tan(A)=\frac{BC}{AB}= \frac{a}{c}[/tex]
[tex]sin(C)=\frac{AB}{AC}= \frac{c}{b}[/tex]
[tex]cos(C)=\frac{BC}{AC}= \frac{a}{b}[/tex]
[tex]tan(C)=\frac{AB}{BC}= \frac{c}{a}[/tex]
therefore
the answer is the option A
[tex]tan(A)[/tex]