cos A =
option 1: 40/9
option 2: 9/41
option 3: 40/41
option 4: 41/40
which is the correct answer?
![cos A option 1 409 option 2 941 option 3 4041 option 4 4140 which is the correct answer class=](https://us-static.z-dn.net/files/d74/910791a6c3cc04962b5b78bb32a5d5ef.png)