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# P1 Revision topic - 1:15pm 9th June - Edexcel watch

1. ok thanks. is anyone using CASIO? i'm using them since year 7 so i would probably mess up with sharps. what's the best CASIO?
2. (Original post by SkylineGTR)
ok thanks. is anyone using CASIO? i'm using them since year 7 so i would probably mess up with sharps. what's the best CASIO?
Ive got fx-991MS its the best
3. no graphical calculators allowed?
4. (Original post by z!D4N)
no graphical calculators allowed?
indeed
5. (Original post by TheWolf)
Ive got fx-991MS its the best
me too and it is the best
6. i think ive mastered P1 except for a few topics.
can someone tell me whether these are hard or its caus i'm missing the obvious.

Algebra-completing the square,inequalities

Trig-solving harder problems eg sin^2(x+pi/6)=1/2 for -pi<x<pi

Coordinate Geometry-how to get coordinates eg when two equations are given

Diffrentiation-max min practical problems,decreasing/increasing functions

i know its quite a bit but if i can get the correct principles i know i can do well in the exam. thanks! ps rep will be given around 30 points
7. Casio fx-85M very usefull
8. i've got Casio fx-83MS and i like it.........so used to my own calculator i get annoyed trying to use other ppls! lol
9. (Original post by chats)

Trig-solving harder problems eg sin^2(x+pi/6)=1/2 for -pi<x<pi
answer is -3pi/4, pi/4 and 3pi/4 right?
10. (Original post by TheWolf)
answer is -3pi/4, pi/4 and 3pi/4 right?
i have no idea
11. (Original post by chats)
Trig-solving harder problems eg sin^2(x+pi/6)=1/2 for pi<x<pi
this is how i would do something like this:

sin(x + pi/6) = 1/√2

x + pi/6 = pi/4

draw CAST diagram
to make it easier, look at the equation in degrees: x+30 = 45
so mark lines at 30 and 150 degrees

x+30 = 45 , 135
x = 15 , 105

x = pi/12 , 7pi/12
12. (Original post by chats)
i think ive mastered P1 except for a few topics.
can someone tell me whether these are hard or its caus i'm missing the obvious.

Algebra-completing the square,inequalities

Trig-solving harder problems eg sin^2(x+pi/6)=1/2 for -pi<x<pi

Coordinate Geometry-how to get coordinates eg when two equations are given

Diffrentiation-max min practical problems,decreasing/increasing functions

i know its quite a bit but if i can get the correct principles i know i can do well in the exam. thanks! ps rep will be given around 30 points
i know this is a bit of a dumb question since you've posted so much on this thread, but have you looked through mik1a's notes at the beginnning on all the topics you're having trouble with. if so, then post any questions you're having difficulty with and i'll help
13. (Original post by mockel)
this is how i would do something like this:

sin(x + pi/6) = 1/√2

x + pi/6 = pi/4

draw CAST diagram
to make it easier, look at the equation in degrees: x+30 = 45
so mark lines at 30 and 150 degrees

x+30 = 45 , 135
x = 15 , 105

x = pi/12 , 7pi/12

you missed out -11pi/12
14. (Original post by mockel)
i know this is a bit of a dumb question since you've posted so much on this thread, but have you looked through mik1a's notes at the beginnning on all the topics you're having trouble with. if so, then post any questions you're having difficulty with and i'll help
ok nevermind i'll find a site on the net. i'll post a question if i need help.
15. (Original post by TheWolf)
you missed out -11pi/12
that's not a solution, is it?
16. (Original post by mockel)
that's not a solution, is it?
well it did say -pi<x<pi so it is
17. (Original post by TheWolf)
well it did say -pi<x<pi so it is
yeah i know....but if you substitute it back into the original equation, you don't get 0.5
18. sorry in that question where does the ^2 go?
19. (Original post by chats)
sorry in that question where does the ^2 go?
sorry should have made it a bit clearer....i square rooted each side, to get sin(x + pi/6) on the LHS, and √(1/2) on the RHS = 1/√2
20. (Original post by TheWolf)
Ive got fx-991MS its the best
I don't see it here...

List (bottom of page)

But it says you can use ANY sharp EL-520, and the 520VA has integration and differentiation! so why can we use it????

and do these have the quadratic formula as well??? i'm relly confused...

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