+0  
 
0
29
2
avatar+80 

1.In triangle ABC, sin A=4/5. Find cos B.

https://latex.artofproblemsolving.com/c/8/3/c83240e209d830cd2275ed9f771185a1d1c17733.png

 

2.Find DB in the diagram below

https://latex.artofproblemsolving.com/f/6/f/f6f917a5c86b363a5cdf8871300d061dcd54fc0b.png

 May 19, 2020
 #1
avatar
0

1. By the cosine law, cos B = 4/13.

 

2. By the sine law, BD = sqrt(3)/3.

 May 19, 2020
 #2
avatar
0

Both of those are wrong

Guest May 19, 2020

12 Online Users