3 years ago

PLEASE SHOW WORK OR EXPLAIN

Mathematics

1 answer:

Ganezh [65]3 years ago

8 0

Answer:

Step-by-step explanation:

$cosine=\dfrac{adjacent}{hypotenuse}\\\\adjacent=BC\\hypotenuse=AB\\\\\cos B=\dfrac{BC}{AB}\\\\\angle B\cong\angle D,\ \text{therefore}\ \cos B=\cos D.\\\\adjacent=ED\\hypotenuse=AD\\\\\cos B=\cos D=\dfrac{ED}{AD}$

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