in ΔBCD, the measure of ∠D=90°, CB = 89, BD = 80, and DC = 39. What ratio represents the cosine of ∠B?

Question

Mathematics

Aleena Dudley

5 October, 03:24

in ΔBCD, the measure of ∠D=90°, CB = 89, BD = 80, and DC = 39. What ratio represents the cosine of ∠B?

+4

Answers (1)

Know the Answer?

Bacchus · Answer 1

The cosine represents the ratio of the length of the adjacent to the length of the hypotenuse

For angle B, adjacent is DC = 39 and hypotenuse is CB which is the longest side

So the ratio representing cosine of angle B is 39/89