Question

if sin A=5by13 find cos A​

Answer 1

Answer:

sin A = 5/13

cos^2 A = 1 - sin^2 A

cos^2 A = 1 - 25/169

cos^2 A = 169-25/169

cos^2 A = 144/ 169

cos A = 12/ 13

hope this helps:)