Which equation can be solved to find one of the missing side lengths in the triangle? Expand Image
A
cosine of open paren 60 degrees close paren is equal to b over AB
cosine of open paren 60 degrees close paren is equal to A over 12C
cosine of open paren 60 degrees close paren is equal to 12 over AD
cosine of open paren 60 degrees close paren is equal to 12 over b