Question

If a = 6, b = 5 and c = 9, then cosA=​

Answer 1

sides are given a b and c

cosA =base/height

=5/9 is the correct answer

Answer 2

Answer:

everyone are telling that 5/9 is correct

though in a trigonometric  point of view it is 7/9 because,

Step-by-step explanation:

cos A = ($b^{2}$+$c^{2}$-$a^{2}$)/(2bc)

when substituted we get 7/9