Question

Find the cosine of ∠E.
A)39/80
B)39/89
C)80/39
D)80/89

Answer 1

Answer:

B) 39/89

Step-by-step explanation:

The question above is on trigonometry.

Cosine of an angle is obtained using the CAH of SOHCAHTOA formula of trigonometry. It is obtained from the ratio of adjacent and hypotenuse of the triangle. Thus, CAH is a denotation of cosine formula; as stated below.

$cosine \: \: \alpha \: = \frac{adjacent}{hypotenuse}$

Therefore from the given shape,

$cosine \: of \: angle \: e = \frac{ |de| }{ |ef| } = \frac{39}{89}$

Thus, the cosine of angle E = 39/89 (B)

Answer 2

Answer:

answer is D) 80/89

Step-by-step explanation: