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  1. MustafaMotani

    Chemistry: Post your doubts here!

    SO2 turn dichromate from orange to green .. in other words it gets oxidised .. daredevil i understand.. :)
  2. MustafaMotani

    Chemistry: Post your doubts here!

    I think H+ ion is just a condition for esterification rather than reagent ... however am not sure in Chem as much I m in maths ;)
  3. MustafaMotani

    Chemistry: Post your doubts here!

    anytime (y)
  4. MustafaMotani

    Chemistry: Post your doubts here!

    yeah its ryt..:) its Ag(NH3)2OH
  5. MustafaMotani

    Mathematics: Post your doubts here!

    so how did yu people find the paper.. ?
  6. MustafaMotani

    Mathematics: Post your doubts here!

    I think u shall get AB and BC by cos rule
  7. MustafaMotani

    Mathematics: Post your doubts here!

    yup thats what i got ... u might have been integratimg incorrectly... refer to my last post i have integrated
  8. MustafaMotani

    Mathematics: Post your doubts here!

    mine is coming -4/15 wats urs..?
  9. MustafaMotani

    Mathematics: Post your doubts here!

    just integrate dy/dx u shall get y= 4(3x+4)^2.5/15 -3x^2 - 8x + C to get value of c just insert (-1,5) in the places of x and y respectively
  10. MustafaMotani

    Mathematics: Post your doubts here!

    sin x = cos (90-x) cos x = sin (90-x) tan(0.5pi-x) is same as tan (90-x) tan (90-x) = sin(90-x)/cos(90-x) = cos x/ sin x = 1/tanx .. :) hope it helps
  11. MustafaMotani

    Mathematics: Post your doubts here!

    its chem bro.. :D
  12. MustafaMotani

    Mathematics: Post your doubts here!

    I know its messed up but i think u can get it.. :)
  13. MustafaMotani

    Mathematics: Post your doubts here!

    ur guess is ryt .. just to be confidence yu can practically try it ...
  14. MustafaMotani

    Mathematics: Post your doubts here!

    triangle is just used for sin x AC is calculated by pythagoras theorem first two part, i recommend yu learn it tan(pi-x) = -tanx and tan(0.5pi-x) = 1/tanx if yu want to know how ... i would be happy to tell you.. there logic lies in tan graph...
  15. MustafaMotani

    Mathematics: Post your doubts here!

    u got me there.. XD
  16. MustafaMotani

    Mathematics: Post your doubts here!

    i posted this before as well
  17. MustafaMotani

    Mathematics: Post your doubts here!

    double derivate was not required in this question .... actually double derivate is just used to tell the nature the of the function ... however i wanted minimum vale dy/dx ... take it this way you have to find minimum value of the function f(x) = 3x^2 -8x +4 You can find it in two ways either...
  18. MustafaMotani

    Mathematics: Post your doubts here!

    Sn=360 a=3 d=2 Pluck these values in Sn=n/2 (2a +(n-1)d) and yu shall get n
  19. MustafaMotani

    Mathematics: Post your doubts here!

    please gve the link.:)
  20. MustafaMotani

    Mathematics: Post your doubts here!

    i) y=0 0=x(x-2) x=0 and x=2 a=2 (since its visible from the graph that a cant be zero) ii) b is a max pt. dy/dx = 3x^2 -8x +4 =0 x= 2 and x= 2/3 b=2/3 (since both turning pts are visible from the graph and b is the first turning pt so i ll take the smaller value of x) (beside a was 2) :D s...
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