Question

I need help with 8-10 . It’s the special right triangles theorem.

Answer 1

Step-by-step explanation:

1.To find the side DE we must use the angle that the exercise gives us and the only value of the side we have, for this we must correctly apply the appropriate triginometric formula.

To find the side ED we must apply the sine theorem, which is the following:

`\begin{gathered} b=\frac{a.\sin \text{ b}}{\sin \text{ a}} \\ \\ \end{gathered}`

Now we must examine which formulas are used to find the angle E and thus solve the exercise.

The angle a is obtained by means of the following formula: