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  1. periyasamy

    Mathematics: Post your doubts here!

    I think i know why.The first line of eqn i wrote should exist in 2 forms.1st is the +3^x n the other form i guess is-3^x. Try n see .I think u wll get the other answer.
  2. periyasamy

    Mathematics: Post your doubts here!

    whats the other value
  3. periyasamy

    Mathematics: Post your doubts here!

    oo.Sorry for that eqn.It actually is the same eqn like y=mx+c but only differnt in form.I continue from what i said above y-asin^3t=-sint/cost(x-acos^3t) so bring the cos the otherside,,,,ycost-asin^3tcost=-xsint+asintcos^3t simplify the rhs eqn with a sintcost so u get finally...
  4. periyasamy

    Mathematics: Post your doubts here!

    sumeru,Bro thanks for the solution today man.But i dont get a slight part in it.I underlined it here.Do u mind to explain it to me man.It can't be integration by parts.So whats it?Thanks man.Sorry man,very dumb in maths.
  5. periyasamy

    Mathematics: Post your doubts here!

    Hi ,this is the way.Ok . from part 1 u get=>>-tant given point is(acos^3t,asin^3t)----->These r the coordinates y-y1=m(x-x1) y-asin^3t=-tant(x-acos^3t) U continue expanding it n u will get it....
  6. periyasamy

    Mathematics: Post your doubts here!

    Do u mean this que 2(3^x-1)=3^x If that is the one,expand the mod n u will get 2(3^x)-2(1)=3^x then 2(3^x)-1(3^x)=2 (3^x)=2 then u can get the x. I hope it helps.
  7. periyasamy

    Mathematics: Post your doubts here!

    Whats the answer for both parts?
  8. periyasamy

    Mathematics: Post your doubts here!

    Wow.What a great working man .Thank u.
  9. periyasamy

    Thank u a lot..Good luck for your exams.Wish u do really do well...

    Thank u a lot..Good luck for your exams.Wish u do really do well...
  10. periyasamy

    Mathematics: Post your doubts here!

    -----Hei guys,have a doubt here.In question 6(11),why does the r is equal to zero? http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s13_qp_31.pdf -----Guys n how do u make 32ln4-8ln2=56ln2.Thanks in advance ----Last question guys.The question...
  11. periyasamy

    Mathematics: Post your doubts here!

    Hai guys need some help. http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20%289709%29/9709_s13_qp_31.pdf Guys,i dont get the question 7(b).Thank u guys.
  12. periyasamy

    Mathematics: Post your doubts here!

    Hei sumeru .I got it until the part u write down.What should i do next? I dont know how to continue.Can u help me man.Very sorry.Very blur in maths.Thanks...
  13. periyasamy

    Mathematics: Post your doubts here!

    Thanks buddy :):):):):):):):):):)....................................:):):):):):):).....................................:):):):):):):):):):)
  14. periyasamy

    Mathematics: Post your doubts here!

    Hei guys.I have some questions man..Thanks guys.. http://maxpapers.com/wp-content/uploads/2012/11/9709_w13_qp_3.pdf http://maxpapers.com/wp-content/uploads/2012/11/9709_w13_ms_3.pdf My questions r from paper 31 Question 5 part 2 Question 6 part 1 Question 7 part 2
  15. periyasamy

    A* physics doubt

    Sure!!!!!
  16. periyasamy

    Chemistry: Post your doubts here!

    Hai guys.Ok my question is the second n 3rd part.I understand how to get the no of c atom n there is a prescence of oh group.But unsure of how to get the no of h atoms...Thanks.Btw the answer is ch3c0ch3....
  17. periyasamy

    Chemistry: Post your doubts here!

    Hi guys have a question here. http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20%289701%29/9701_w10_qp_41.pdf For the question 7c,i know part 1 cause it is memorising stuff.But for part 2 based on diagram,how do i know its octahedral.Is it...
  18. periyasamy

    Mathematics: Post your doubts here!

    Guys i have a question here. Forthe question 10 in oct nov 13(31) 1st part,i get dv/dt=-k sqr root h dv/dh=1/3pi r ^2 now to get dr/dt=>what should i do to get rid the r.. Thanks guys........ http://maxpapers.com/wp-content/uploads/2012/11/9709_w13_qp_3.pdf...
  19. periyasamy

    Mathematics: Post your doubts here!

    Thank u....What a great sketch...
  20. periyasamy

    Mathematics: Post your doubts here!

    Hi guys,have a question here. Can anyone help me withthe sketch of this question. Thank u...
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