In triangle ABC, we have AB = 5, BC = 8, and AC = 9, as shown below
Calculate cos A, cos B, cos C.
I dont know if you are posting the same question that was posted here a few months ago. To save us and EP some work heres an answer to the same question posted a bit ago.
https://web2.0calc.com/questions/pre-calc_100
Edited, Thanks llovepuppies,
I just put the address into a hyperlink