-
We need your support!
We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
Click here to Donate Now (View Announcement)
Search results
-
Chemistry: Post your doubts here!
hello, can any chemist please explain why when mixing two solutions of equal volume their concentration is diluted by 2 ??? -
Mathematics: Post your doubts here!
can someone explain why x< 5/3 was not introduced in this question and the answer is only x< 1 ? question 3 may/june 2003 http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_s03_qp_3.pdf -
Chemistry: Post your doubts here!
hey i think its like that.. when the size of the ion increases they have weaker charge density because now the same charge spreads over a larger volume. weaker charge density means they will not strongly attract the dipoles of water molecules so they will be less soluble in water and therefore... -
Mathematics: Post your doubts here!
hey i figured out the answer to this question, √10 cos (x-71.57) = cos 2θ + 3sin 2θ and from that we can say that √10 cos (x-71.57) let x = 2θ and let S = x-71.57 just to make things simpler now we can say √10 cos S = 2 S = cos^-1 (2/√10) S = 50.8 and to get another value we will have... -
Mathematics: Post your doubts here!
can someone pls explain to me question 6 (ii) in oct/nov 2006 http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w06_qp_3.pdf -
Mathematics: Post your doubts here!
yeah plus u need to know cot = 1/tan or cot = cos/sin and cosec = 1/sin and sec = 1/cos -
Mathematics: Post your doubts here!
i checked the syllabus if thats what u mean then yes these r the formulas also -
Mathematics: Post your doubts here!
nah there isn't any specific technique u will just need to memorize all the trig formulas u have from ur AS level and A2 level book and practice a lot of questions on prove identity to get experienced in solving them. you only need to memorize the formulas and practice a lot to be experienced... -
Mathematics: Post your doubts here!
cos 4θ + 4cos 2θ = 8cos^4 θ -3 cos 4θ = 2cos^2 2θ -1 ( double angle formulae ) 2cos^2 2θ - 1 + 4cos 2θ 2 (cos 2θ)(cos2θ) - 1 + 4cos 2θ use the double angle formula again cos 2θ = 2cos^2 θ -1 2(2cos^2 θ -1)(2cos^2 θ -1 )-1 +4(2cos^2 θ-1) 2(4cos^4 θ -4cos^2 θ +1)-1 +8cos^2θ -4 expand the... -
Mathematics: Post your doubts here!
can someone please explain question 5 of this paper in FULL DETAILS! http://papers.xtremepapers.com/CIE/...AS Level/Mathematics (9709)/9709_w06_qp_3.pdf thank you. -
Mathematics: Post your doubts here!
can someone please explain question 5 of this paper in FULL DETAILS! http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w06_qp_3.pdf thank you. -
Mathematics: Post your doubts here!
what paper is this or is it 1/6x + 5 and 1/2x + 1 or 1/2x+1 as in 2x+1 the denominator? -
Mathematics: Post your doubts here!
ok bro for this question u need to know trig identities and integration by substitution so here is the solution for it.. x = tan Q ∫ (1-x^2)/ (1+x^2)^2 dx = ∫cos 2Q dQ dx/dQ = sec^2 Q dx = sec^2 Q dQ ∫(1-tan^2 Q)/ (1+tan^2 Q)^2 sec^2 dQ ok i wont add the Q now cuz its a bit annoying... -
Chemistry: Post your doubts here!
is there a different? Oo i think all combustion of hydrocarbons r the same! -
Is statistics 1 easier than mechanics2???
what do u wish to study in university ? -
Mathematics: Post your doubts here!
yeah nevermind..i got it now i just didn't know how to multiply 5(2^x-1) -
Mathematics: Post your doubts here!
how this stupid question can be solved!!! :@ (2^x + 1 ) / (2^x - 1 ) = 5 first question in m/j 2010 32 -
Mathematics: Post your doubts here!
how did uk that 2+e^-x = e^2 -
CHEMISTRY PAPER 1
i remember the one we did in may/june 2012 paper 11 was sooooooo tough that the GT was so slow that u would get a B if u scored 20/40 i guess -
Chemistry MCQ thread...
this is not a discussion..we r talking generally about chemistry. i didn't even do the exam today but i just answered his "general chemistry question" sorry if this was part of the exam and i have discussed it..i didn't even know u guys had an exam today