Respuesta :

nonsibi

EF: sin(26°) x hypotenuse(4.5)

It already gives you an approximation for the sine of 26 degrees. I will just use that approximation.

EF = 0.90 x 4.5 = 4.05 units

answer: 4.05 units

altavistard

Answer:

| EF | = 1.97

Step-by-step explanation:

If Angle FDE is 26 degrees, then Angle DFE is 90 - 26 (degrees), or 64 degrees.

Since cos 64 degrees = 0.438, the length of EF is 4.5 cos 64 degrees, or

| EF | = 4.5(0.438) = 1.971.

| EF | = 1.97 (to two decimal places)