Jane Lee

3 years ago

Sorry teacher, my brother also sane answer but it’s wrong. Thats i try to help him

Eric Nicholas K

3 years ago

The answers by BOTH the tutor and the brother are correct.

I'm pretty sure the system is rigged.

Eric Nicholas K

3 years ago

Anyway part b has a shorter method:

tan inverse of (7 / answer from part a)

Eric Nicholas K

3 years ago

Part d is tan inverse of (7 / answer from part c).

Eric Nicholas K

3 years ago

Jane, you can ask your brother to check with his teacher.

I did the same question myself and obtained the same answers for the first two parts.

Jane Lee

3 years ago

TQ teacher. I tell my brother not to worry. The answer is correct.
Thank you so much to both teacher helping my bro.

J

3 years ago

You try 33.4 or 33.6 for part a). It might be a truncation error on the teacher side

Eric Nicholas K

3 years ago

A good system will allow the answer as well.

The other day I looked at my student doing his online work. He put a different form of the answer and it’s still marked correct.

J

3 years ago

The thing is, you don't know which system this is. So might as well try those two. If still cannot, then the student can report this issue to the teacher.

Eric Nicholas K

3 years ago

33.4 is more likely, since the calculated value is 33.46 I think.

Or the teacher who set the question may wrongly put the calculated value in radian mode. We never know.

J

3 years ago

I see a 'copyright @ MOE' so it's likely to be SLS.

Jane Lee

3 years ago

TQ