There are three sides in a right triangle, adjacent, opposite and hypotenuse.
The trigonometric functions sin, cos and tan are the ratios of the sides given. The formulas of functions is given below.
[tex]\begin{gathered} \sin \theta=\frac{\text{oppsite}}{\text{hypotenuse}} \\ \cos \theta=\frac{\text{adjacent}}{\text{hypotenuse}} \\ \tan \theta=\frac{\text{opposite}}{\text{adjacent}} \end{gathered}[/tex]
