Question

The answer to chose from are 5/4, 3/4, 4/3, 5/3, 4/5, and 3/5

Answer 1

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:

`\begin{gathered} \sin (A)=(BC)/(AB)=(4)/(5) \\ \tan (A)=(BC)/(AC)=(4)/(3) \\ \cos (A)=(AC)/(AB)=(3)/(5) \end{gathered}`