In a right triangle if you’re trying to find an angle, the ratio of an angle, or the length of a side, there are three ratios that you can use.
First the sine ration. The sine ratio is the length of the side opposite to the angle divided by the length of the hypotenuse of the triangle. Secondly, you have the cosine ratio. The side ratio is the length of the side adjacent to the angle divided by the length of the hypotenuse. And lastly, the tangent ratio. The tangent ratio is the length of the side opposite to the angle divided by the length of the side adjacent to the angle.