ATAR Notes: Forum

Archived Discussion => Mathematics and Science => 2012 => End-of-year exams => Exam Discussion => Victoria => Specialist Mathematics => Topic started by: jessiele on November 11, 2012, 09:31:27 pm

Title: help!
Post by: jessiele on November 11, 2012, 09:31:27 pm: can anyone please tell me that whether I'll lose marks if I write integration xtan^-1(x) instead of arctan(x)?
I checked VCAA solutions, and it states as arctan(x) but if i do happen to write an alternative way, will I lose mark? thanks
Title: Re: help!
Post by: paulsterio on November 11, 2012, 09:36:31 pm: $x.tan^{-1}(x)$ is the same as $x.arctan(x)$ NOT $arctan(x)$
Title: Re: help!
Post by: jessiele on November 11, 2012, 10:06:54 pm: opps typo! but yeah, thats what I meant so I will not lose marks if I write down x.tan^-1(x) yeah?
Title: Re: help!
Post by: BubbleWrapMan on November 11, 2012, 11:38:09 pm: No, they often write it as that anyway