Parametric Equations - Exact Values Required | Tricky A-Level Maths Question #54

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[@junyouzhang800]

PLEASE NEVER STOP W THIS SERIES. MAYBE DO ONE FOR FM TOO PLS

[@aa-gn6zn]

Wish I discovered this channel earlier

[@colinjava8447]

I just did it for fun and got the same answer, my brain isn't complete mush yet.
The trick for the last one is not to find t (but I don't think you could anyway as lots of values would work) but to find cos t and cos 2t as that's part of the parametrization.

[@mrqwerty4792]

First (please say "bosh!")

[@MrAstburyMaths]

BOSHHHHH!!!

[@abysmal7000]

where can we watch the live recording from wednesday?

[@adeshewaadebayo7480]

sir I did this funnily i solved the Cartesian equation then subbed it in to l i got the same answer but is your version faster

[@briginshaw1]

Unrelated question but are the mock edexcel papers generally harder than past papers ?

[@ionacrosbie2459]

Hi sir, I did this question and ended up getting the exact (correct answer) for part C but i did it a completely different way, would i still get the full marks?

[@LinkerPlayzNew]

Hello, sir I would like to suggest you do more IGCSE questions as the exam is very close.

[@mroanhaggar40]

To find the y value for the last question I tried to draw a mini triangle with the adjacent side as 5, hypotenuse as 6 and opposite as root11. That then gives me sint=root11/6 and we already know cost so then I did y = 2root3sintcost but that gives me an answer of 5root33/18. Is the method valid and I just made a mistake or the method not valid?

[@CommanderCodyCC]

Hi Mr Asterbury would it be possible to make a video of #3d trigonometry from series 2 for IGCSE? I understand if it's not possible and appricate all the work you have given to everyone for free!

[@sentheaS]

I wasted a solid extra minute on (b) and sort of blindly powered through with doubt, all because I bloody rationalised the denominator when finding -dx/dy, which meant I did much more unnecessary manipulation to get the equation in the form they wanted.. curse whoever decided that curriculum should emphasize 'rationalising the denominator', so superfluous lol

[@jimmyneutron9525]

These are from the mock set papers right?

[@MrAstburyMaths]

The sample papers

[@jimmyneutron9525]

@@MrAstburyMaths oh right, I got confused because I done this paper today along with mock set papers

[@Ace__Matic]

no way i literally just did the sample paper that contains this question like an hour ago 😂 it was easy tho

[@styllonestiff7087]

is this edexcel, feels like it’s way too easy for 13 marks

[@FuturePastPerson]

It’s easy until the grade boundaries screw everyone over because the test wasn’t hard enough (rip my 2023 AQA fallen soldiers)

[@pyroflame5414]

you'd be surprised how many people get those questions wrong, probably less than 30% of people got that entire question right.

[@danyaliqqbal3368]

Last please say bosshhhh

[@khan99ish]

Second (please say "bosh!")