Answer:
B
Step-by-step explanation:
b is the symbol for the side opposite angle B. c is the symbol for the side opposite Using the notation in the above triangles
The triangle that is cos b = 0.8 is triangle d.
The triangles in the diagram are right triangle. Right triangles are triangles that have an angle that is 90 degrees. The sum of angles is 180 degrees.
In order to make use of cos, the value of the adjacent and the hypotenuse would be needed.
Cos = adjacent / hypotenuse
Triangle A:
The value of the adjacent side would be determined using pythagoras theroem
5² - 4²
= 25 - 16
= √9 = 3
Cos B = 3/5 = 0.6
Triangle B:
Cos B = 5/8 = 0.625
Triangle C:
Value of the hypotenuse = 4² + 5²
16 + 25
√41 = 6.4
Cos B = 4/6.4 = 0.62
Triangle D:
Cos B = 4/5 = 0.8
To learn more about triangles, please check: https://brainly.com/question/7894175
