Yeah, you do have to add it, that's one of the errors, the other one is that the last question is 80.4 and not 80.3.
There is definitely going to be a range because people will round at different stages so they will end up with a different answer. Past mark schemes have also allowed a range.
There is definitely going to be a range because people will round at different stages so they will end up with a different answer. Past mark schemes have also allowed a range.
I know what you mean, however when it comes to angles, there's no range because an angle is an angle so whatever method you use you should get the same answer.
I'll show you the error in this one, if you look closely the person has worked out that angle CBA= 40.00..... using the area of a triangle formula, however when it comes to using the sine rule he puts in sin(40) which is incorrect, you can't just round the angle to 2 s.f.
I know what you mean, however when it comes to angles, there's no range because an angle is an angle so whatever method you use you should get the same answer.
I'll show you the error in this one, if you look closely the person has worked out that angle CBA= 40.00..... using the area of a triangle formula, however when it comes to using the sine rule he puts in sin(40) which is incorrect, you can't just round the angle to 2 s.f.
There has been ranges on past papers for angles before though.