Maths Extension 1 Predictions/Thoughts (13 Viewers)

[coolcat6778]

The t-formula



is only valid when t is actually defined.

Notice that there are certain angles where t is undefined. So it possible your trig equation happens to work for those undefined values of t, in which case using the t-formula will only retrieve a subset of the full solutions.

yo could you update the website to use svg latex instead? https://latex.codecogs.com/

 

[Geniusly]

Y'all, just confirming, for binomial distribution questions, is it fine if you use either sample proportioning method or the count method to solve the q's, particularly to obtain z-scores?
Thanks

They both work out to give the same z score, but if the question is clearly a sample proportion (says something like 'A random sample of 50 boxes from the 200 were tested' or something like that), then use the sample proportion method just in case.

 

[BionicMango]

Good luck today guys

 

[Allan Mekisic]

Last year 9 marks were allocated to inverse functions so probably little on this today. I’m expecting a difficult polynomials question, lots of mechanics and maybe a difficult binomial proof in Q 14. Also they have never asked a plane or object suspended from a ceiling in ext 1 although it’s in the syllabus. They didn’t ask this in extension 2 this year or last year so may be something for today.