Finishing the 3u paper. (1 Viewer)

[Libbster]

What type of inequalities, the ones like (x-6)/ x-1 > 0

Just square the stuff on the bottom so then it will be (x-6)(x-1) > 0

Then draw a graph and see where the inequality is greater or less than zero etc etc

 

[~ ReNcH ~]

I loathe binomial theorem...most other things are ok though.

 

[FinalFantasy]

I loathe binomial theorem...most other things are ok though.

wat about probability?
i hate dat

 

[crazy_viet]

yeah im trying to breeze through the first few questions of both ext1 and 2. for a past pare for ext 2, i did the first 2 questions in about 20 minutes, and did fairly well. trying to do similar with future exams and such leaving me time to do the last few.

 

[Jago]

What are these type of questions called? and where would i find examples?

Express sin4t + root3 cos4t in the form Rsin(4t+x), where x is in radians?

I have trouble with these sorts of questions since i really can't remember doing them at school...

 

[ishq]

Normalise them!
They are in the inverse trig chapter (near the end)..followed into the SHM chapter.
Edit: They use cos(a+b)/sin(a+b) rules...whichever chappie that is in for ur book...

 

[velox]

They're called transformations. They're in the trig chapter of fitz, although i dont recommend using fitz.

 

[Dreamerish*~]

What are these type of questions called? and where would i find examples?

Express sin4t + root3 cos4t in the form Rsin(4t+x), where x is in radians?

I have trouble with these sorts of questions since i really can't remember doing them at school...

Oh damn, I hate those. I think they're called general solutions, or something.

I just remember that it involes adding the square roots of things...

Anyway, regarding the time limit, I don't think 2 hours is too challenging. I've been doing some past trials papers from my school, and there are usually around 7-8 questions. In assessments we got around 4 with the time limit of one hour, so 7-8 in two hours isn't too bad. I could probably finish with 5 minutes to spare, unless they pour in the hard polynomial questions involving 4 roots and a whole crapload of algebra.

 

[FinalFantasy]

What are these type of questions called? and where would i find examples?

Express sin4t + root3 cos4t in the form Rsin(4t+x), where x is in radians?

I have trouble with these sorts of questions since i really can't remember doing them at school...

just expand RHS and equate coefficients

e.g Rsin(4t+x)=R( sin4tcosx+cos4tsinx)=sin4t(Rcosx)+cos4t(Rsinx)
so u equate coefficients then u get 1=Rcosx and root 3=Rsinx
then u just do stuff to get R den put it back and get x as well
then re write again den u get the whole thing

and i dunno wat their called, i just call them "trig" lol

 

[velox]

Ishq u can just use the short way

 

[~ ReNcH ~]

It's called "the auxiliary angle method"

 

[~ ReNcH ~]

wat about probability?
i hate dat

Yea...that too
But in a way that's part of binomial.

 

[richz]

Oh damn, I hate those. I think they're called general solutions, or something.

I just remember that it involes adding the square roots of things...

Anyway, regarding the time limit, I don't think 2 hours is too challenging. I've been doing some past trials papers from my school, and there are usually around 7-8 questions. In assessments we got around 4 with the time limit of one hour, so 7-8 in two hours isn't too bad. I could probably finish with 5 minutes to spare, unless they pour in the hard polynomial questions involving 4 roots and a whole crapload of algebra.

i think they are called transformations