Mathematics: Post your doubts here!

[A star]

but this doesnt mean we wil not study it

 

[Buzzkiller]

Nov 12/13/Q 6
Help!!

 

[A star]

people we dont have time so pls give link with ur question

 

[Zarif009]

General Questions:
Should we underline our final answers with a double line? Some people say we should because it helps the examiner.

And when writing down degrees in radians... do we have to use the word 'radian' ? such as 1.21 radian

 

[A star]

i dont suggest it as some times it might make your answer messy and unreadable . ( if u have messy writting )

 

[Buzzkiller]

people we dont have time so pls give link with ur question

there you go:
http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w12_qp_13.pdf

 

[Buzzkiller]

question six in this

 

[Zarif009]

Okay thanks and what about the radian question??

 

[A star]

well in 6i) cos(x/2 + pie/6) =1
cos-1(1)=x/2 +pie/6
0=x\2 +pie/6
pie/3 =x
6ii f(g)= 1 hence sub
cosx/2 +pie/6 =1
cosx/2 =1-pie/6
cosx= 0.4764*2
cosx=0. 9528
x=0.31 and for the negative value we have to take x= -0.31
x=+-0.31

 

[A star]

i think using radian is not mandatory but u can use it as a safeguard . ask someone else as i am not sure upon this point

 

[ShreeyaBeatz]

Guys till how many significant figures should we round our answers in the paper tomorrow ..!! pleasse..quick.

3 s.f

teach me this !
f(x)=4-sinx
- find the set of values of k for which the equation f(x)=k has no solution


my xam is just 4 hrs away

 

[Buzzkiller]

is

well in 6i) cos(x/2 + pie/6) =1
cos-1(1)=x/2 +pie/6
0=x\2 +pie/6
pie/3 =x
6ii f(g)= 1 hence sub
cosx/2 +pie/6 =1
cosx/2 =1-pie/6
cosx= 0.4764*2
cosx=0. 9528
x=0.31 and for the negative value we have to take x= -0.31
x=+-0.31

isn't the answer to the first part minus pie/3.
Can you recheck it again,please?

 

[A star]

sorry forgot to put the minus sign

is
isn't the answer to the first part minus pie/3.
Can you recheck it again,please?

 

[A star]

3 s.f

teach me this !
f(x)=4-sinx
- find the set of values of k for which the equation f(x)=k has no solution


my xam is just 4 hrs away

you sure this is the full question

 

[Mayedah]

Thankyouuuu

 

[Maz]

so me u daredevil asd mustafamotani asd and syed will be there to answer queries

Me too. Although i hate stats, especially permuations and combinations.

 

[A star]

all of us hate it

 

[syed1995]

all of us hate it

But we have to solve it anyway.

 

[PANDA-]

i think using radian is not mandatory but u can use it as a safeguard . ask someone else as i am not sure upon this point

It's mandatory if the domain is given in radians... like 0 < x < pi. It clearly says in the ms, must be in radian.
1.5 hrs left for my exam, terrified here.

 

[HorsePower]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w12_qp_11.pdf
Q7 ii) plzzz