+0  
 
0
406
1
avatar

Help, please!! What is mA?

 

 Jul 24, 2020
 #1
avatar+36915 
+1

Use cosine rule

a^2 + b^2 - 2ab cos = c^2

32 + 7- 2 (3)(7) cos A = 5^2    solve for cos A 

 

The arc cos     

 Jul 24, 2020

2 Online Users