Find the sine ratio of angle O (theta ).Hint: Use the slash symbol (/) to represent the fraction bar, and enter the fraction with no spaces.( Please help. This extra reference question is making me confuse .)

For angle theta, perpendicular side is AB = 12 and hypotenuse side is BC = 13.
The sine of angle is equal to the ratio of perpendicular side to the hypotenuse side. So sine of angle theta is,
[tex]\sin \theta=\frac{12}{13}[/tex]So sine ratio angle theta is 12/13.