Mathematics: Post your doubts here!

[Success_is_my_objective]

Maths AS June 02 paper 1 number 5 I'm not getting the correct angle..does anyone has the paper or should i scan the question?

 

[Kumkum]

perameter of window = perameter of semi crcle + peramtr of rctngle
8 = 2πr/2 + 2(2r + h)
8= πr + 4r+2h
8 - πr - 4r =2h
(8 - πr - 4r )/2 = h slved

now prt 2

area of window = area of semi crcle + area of rectangle
A = πr^2/2 + 2r*h ..... substitute the vLUE of h here whch was expresse earliear.

that is exactly what i did but the answer in the marking scheme is not that. http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s04_ms.pdf (question 8(i) and (ii)). so how then do you do it?

 

[Prathmesh Thakkar]

Here's the question.
View attachment 16338

for a (i) u can use the equation....(x+5)/2=X^2-4x+7...
substitute this further to get a quatratic equation....you will get two value for x....
Then substitue the x values in the eqn of the line, i e, y=mx+c

Hope it helped...

 

[Kumkum]

so u did find the gradient of the two equation so then apply the formula tanx=m.u will get two angles becoz there is 2 gradient so find the difference in angle and thats the answe

the formula you gave what is "m" and "u"? please explain..never seen the formula

 

[leadingguy]

that is exactly what i did but the answer in the marking scheme is not that. http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s04_ms.pdf (question 8(i) and (ii)). so how then do you do it?

i dnt knw what r u upto bt the ans is correct i jxt checked :S

 

[Tkp]

the formula you gave what is "m" and "u"? please explain..never seen the formula

hey m is the gradient and i meant you

 

[Tkp]

the formula is tanx =m

 

[Tkp]

i forgot to put the comma

 

[hussamh10]

nopes enjoy

thanx

 

[Kumkum]

i forgot to put the comma

oh ok.

 

[Kumkum]

i dnt knw what r u upto bt the ans is correct i jxt checked :S

sorry, i'm the one who is confused. i did not read the marking key properly. but thanks anyway.

 

[leadingguy]

sorry, i'm the one who is confused. i did not read the marking key properly. but thanks anyway.

no worries

 

[leadingguy]

hi.. guys do you have some hints about the paper of tomorrow maths p1????

yes... thepaper will consist of 11 questions or even 10. aa question from binomial a question frm functions and a vector question for findng angle will surely come.. be prepared ENJOY

 

[Silver Wing]

Who is taking A-level mathematics and who is only taking AS-level and what combinations are you taking

 

[Prathmesh Thakkar]

Please Help me with this buddies :
What is meant by real values of x ??? Does it include negative values ??
And How do we round 369,335.3 to 3 sf ? Is it 370,000 or 369,000 ?

369000 and yes real values include negatives decimals roots cube roots everything.....

 

[Pals_1010]

If tan x = k, express in terms of k

(i) tan(pi - x)
(ii) tan (0.5pi - x)

 

[leadingguy]

suppose that x = 30
now tan (180 - 30 ) = tan 150 = -tan30 / tanx got it????

 

[Anamol shrestha]

help...w10_qp_12 question no. 7 (iii) urgent​

 

[Tkp]

If tan x = k, express in terms of k

(i) tan(pi - x)
(ii) tan (0.5pi - x)

i have also the same prblm here

 

[Anamol shrestha]

is ans of i) -tank.. and ans of... ii)tank