Edexcel Maths A level Predicted Pure Paper 2 questions Geometric Series Trig identities Summer 2022

[@domxnxcxx]

I JUST REALLY WANT TO SAY THANK YOU, A SIMILAR QUESTION ON GEOMETRIC-TRIG CAME UP ON PAPER 2, I WATCHED THIS VIDEO AN HOUR BEFORE MY EXAM, AND IT REALLY HELPED

[@kanyin499]

Same here!

[@kanyin499]

Thank you so so much, I watched this on my way to school this morning and a similar question came up! I wouldn’t have been able to answer it without you!

[@areeb04]

Really appreciate these videos!

[@gcsealevelmathstutor5665]

Glad you like them!

[@veem3150]

Good morning. Just wanted to express my gratitude and thanks for these videos. The predicted questions video assisted greatly during Paper 2 yesterday. Consequently, do you have plans for a Predicted Paper 3 Mechanics? Any others associated with next week's paper? Thanks

[@gcsealevelmathstutor5665]

kzbin.info/www/bejne/anjKkp2aqqeMitE kzbin.info/www/bejne/d5fbg4mPesh0ac0 Here you go! Good Luck!

[@veem3150]

@@gcsealevelmathstutor5665 Many thanks indeed.

[@joshuaoxley2989]

For the set of values, we got -2pi/3

[@lm2236]

im doing AS maths next year and I'm very scared looking at this video

[@TheGamingGuavaBeast]

Wow nice questions 🤘👍🙏

[@gcsealevelmathstutor5665]

Glad you liked it!

[@DesmondBXChen]

Hi, could you go through some questions with maximum and minimum points using Newton Raphson? Cheers

[@gcsealevelmathstutor5665]

There is one on this video at 17:02 but I will try to do some more kzbin.info/www/bejne/laDFY2yHqM2Yj9E

[@Aman-ll5nj]

When I do sin-1 of -1+root17 over 4, I am getting a different value!!

[@J65-d6n]

Please can you do more differentiation questions?

[@yusraaa9418]

hii im a little confused on why lrl ]1

[@gcsealevelmathstutor5665]

The mod lines either side mean that if the value is negative it is read as positive so r < 1 means that r is less than 1 but if the value was say -2 then the mod lines would read it as 2 which is not less than 1. The smallest number to go between the mod lines to then be read as less than 1 is -1 so | r | < 1 means the same as -1 < r < 1. Hope that makes sense Good luck with your exams and thanks for watching.

[@LEGENDARY_KHAN]

Legend

[@ajaypun8180]

could you explain why you used value '128.6' and not '51.3' for question 9 c) , please?? and I tried using 51.33 but S(infinity) which will give3.9 and not 0.43. thank you

[@gcsealevelmathstutor5665]

because it specifies in the question that the range for the angle is between 90 and 180

[@melbelay6497]

hi could you explain why you used 1/2 after you drew the cos graph

[@gcsealevelmathstutor5665]

because if the series is to converge rather than diverge the common ratio r must lie between -1 and 1 so as r is 2Cosx we can put that in the inequality and divide both sides by 2 to get that cosx must lie between -1/2 and 1/2 then just do inverse cos to get the angle which is Pi/3 , hope that makes sense.

[@surejoon8586]

since proof by contradiction came up on the first paper, will the second paper have a different proof question ? like proof by counterexample

[@gcsealevelmathstutor5665]

You don't know but I would definitely look at proof by exhaustion and proof by counter example. I have made a video on proof. Here is the link kzbin.info/www/bejne/gZKklGVtl5dsf6s

[@ItsMD132]

Why did we use π/3 by the way?

[@gcsealevelmathstutor5665]

Because Cos(Pi/3) =1/2

[@elliothosie3206]

@@gcsealevelmathstutor5665 Hi, I dont quite understand where the Pi/2 came from. I did cos^-1 (-1/2) and cos^-1(1/2) and got answers of x= 2pi/3 and x=pi/3 ..

[@gcsealevelmathstutor5665]

@@elliothosie3206 It is given in the range in the question

[@elliothosie3206]

@@gcsealevelmathstutor5665 and for part c, cos^-1 (1/4) i get 1.318116072 which is not root15/4 so i dont understand.

[@gcsealevelmathstutor5665]

@@elliothosie3206 You are just looking at where the Cos graph is below 1/2 in the range -pi/2 and pi/2 as in that range the cos graph is positive

[@ornamentalfish4859]

is arccos on the spec?

[@gcsealevelmathstutor5665]

Yes it it just the same as inverse Cos which is Cos ^-1

[@HyperDavester]

Awesome video! I started a KZbin channel that teaches content. Would love your feedback on it!

[@ajaypun8180]

could you explain why you used value '128.6' and not '51.3' for question 9 c) , please?? and I tried using 51.33 but S(infinity) which will give3.9 and not 0.43. thank you

[@gcsealevelmathstutor5665]

Because it says in the question that the angle is between 90 and 180

[@ajaypun8180]

thank you!