In order to calculate the sine, cosine and tangent of angle A, we need to know the following:
The sine relation is the length of the opposite side to the angle over the length of the hypotenuse;
The cosine relation is the length of the adjacent side to the angle over the length of the hypotenuse;
The tangent relation is the length of the opposite side to the angle over the length of the adjacent side to the angle.
Knowing that, we have:
