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Chemistry: Post your doubts here!
i used more than half of y-axis as well, but to show scaling i took a close pic . and if we start from 0 , values wouldnt be enough -
Chemistry: Post your doubts here!
Chemistry paper 5 , Is my scaling right? will i get marks for this.. actually my graph completed more than half of grid but i took a part of pic to zoom the scaling . -
Mathematics: Post your doubts here!
replace cotx with cosx/sinx ie ( 1/ tanx ) and cot2x with cos2x / sin2x and use the identities sin2x =2sinxcosx and cos2x =2cos^2 x - 1 to get the answer -
Mathematics: Post your doubts here!
If you draw this on the number line // you will find that the two roots go away from each other . for eg when you get your answer as x>-2 and x<4 your answer will be -2>x>4 since when you draw the two roots above they coincide -
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AS ( ALL ) subjects practical Tips + Some important Notes ! Dont miss ")
@XPFMember :D This thread really Deserves to be sticky as he said for all time he has spent searching for this stuff . -
Chemistry: Post your doubts here!
Thats the same which came to mind too :barefoot: This was the marking scheme .. for q no. 5 (a) Reaction (ii) http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_s07_ms_4.pdf -
Chemistry: Post your doubts here!
is it that simple o_O But does it make sense adding hf to methyl beneze .. i mean there should be a flouride in the compound ? we know that hydrogen fluoride is HF :p most probably it stands for a condition -
Chemistry: Post your doubts here!
For converting Methyl benzene To Chloromethyl benzene .. in the Free radical substitution ...we need Cl2 and hf as reagent and condition .. as stated in marking scheme .. My question is what is ( hf ) ? -
Result date for October 2013 session.
24 January 2014 ... Friday source : cie official website http://ask.cie.org.uk/system/selfservice.controller?CONFIGURATION=1035&PARTITION_ID=1&TIMEZONE_OFFSET=&USERTYPE=&CMD=VIEW_ARTICLE&ARTICLE_ID=5598 -
Mathematics: Post your doubts here!
when you expand ... add all cofficients of x ... and equate with zero to find a -
Mathematics: Post your doubts here!
OMG!!:oops: To explain this , if you integrate cos(ax) form .. it will be 1/a sin(ax)... same with integrating sin(ax) which is -1/a cos (ax ) since integral of sinx is -cosx .... Now when it comes to limits .. we got the equation as 1/2 sin2(theta) .... right ? so when substituting the... -
Mathematics: Post your doubts here!
using the binomial expansion formulae >> in your textbook .... say your expansion is 1 + 2ax + 6bx^2 >> here the cofficient of x is ( 2a ) ... ie all numbers with x ... and coffiecient of x^2 is ( 6b ) -
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Mathematics: Post your doubts here!
i understood till the marked point , can you explain what did you do after that ? - For the remainder >> can you solve it also -
Mathematics: Post your doubts here!
Express 3 + 0.5ln4 -1.5ln6 -0.5ln1 + 1.5ln3 as Exact logarithm ..... Answer is 3- 0.5ln2 -
Mathematics: Post your doubts here!
Find the Remainder when 8x^3-10x^2 -x +3 is Divided by 2x^2 -1 ...... Answer is 3x -2 but i get it as -2 only! -
Mathematics: Post your doubts here!
hope this helps .. btw do u do M2 ? -
Give it a minute!
can you help me bro ? my topic is centre of mass ... http://papers.xtremepapers.com/CIE/...AS Level/Mathematics (9709)/9709_s08_qp_5.pdf >>> Q 4 .. http://papers.xtremepapers.com/CIE/...AS Level/Mathematics (9709)/9709_s07_qp_5.pdf >>> Q 4 ..