In triangle ABC, we have AB = 5, BC = 8, and AC = 7.
Calculate cos(A), cos(B), and cos(C).
I feel like the way to go is to drop an altitude, but I'm a bit confused after that.
+37153 Use cos law
c^2 = a^2 + b^2 - 2ab cos c
example to find cos a
8^2 = 5^2 + 7^2 - 2 ( 5 )( 7) cos a solve for cos a the others are similar
+37153 Use cos law
c^2 = a^2 + b^2 - 2ab cos c
example to find cos a
8^2 = 5^2 + 7^2 - 2 ( 5 )( 7) cos a solve for cos a the others are similar
