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  1. M

    Mathematics: Post your doubts here!

    ok...i think its cosecx/(cotx+ tanx)....so...do this way.. Cotx+tanx=cosx/sinx +sinx/cosx = sin^2x+cos^2x/Sinx.Cosx =1/Sinx.Cosx . Now cosecx .sinx.cosx=cosx..hence proved
  2. M

    Mathematics: Post your doubts here!

    u mean...cosecx/(cotx+ tanx) or (cosecx/cotx)+tanx?? Assalamoalaikum!! She meant cosecx/(cotx+ tanx) Well remember, for proving identities, always change the given in terms of sin and cos..and then simplify and change it to the required form.. cosec x = 1 / sin x cot x = cos x / sinx tan x...
  3. M

    Mathematics: Post your doubts here!

    no no...!! p(z) = .....................then..just we put p(z^2)= only..where there's z..!! not for the constant.!! we substituted z as z^2..thats it...!!
  4. M

    Mathematics: Post your doubts here!

    Well dude..without practising a single past paper.....A is gud..if i have practiced them all...have got A*......i wont retake...!! m reappearing biology...not maths....and...what 32 are u talking bout?
  5. M

    Mathematics: Post your doubts here!

    Well, i cannot solve any of those two....my knowledge is not enough..
  6. M

    Mathematics: Post your doubts here!

    Dude...i already got A in maths....!! i have biology tomorrow...!! :D
  7. M

    Mathematics: Post your doubts here!

    that would b easy to do...since u have a last number as 32...so the factors of 32 are....1 2 4 8 16 and 32...also in the negative...however, the positive number cannot make that function zero..so try the negative ones...!! like..put -1 in place of z...and see if it makes the whole function...
  8. M

    Mathematics: Post your doubts here!

    i dont think this is possible...where's the = sign there?? it lost?
  9. M

    Mathematics: Post your doubts here!

    p(z^2)=z^6 +mz^4+24z^2+32 and....the factor for this equation which can makes this zero are -1 -2 -4 -8 -16 and -32...so try these...are check whether this can b zero or not....!! this will reduce ur time...
  10. M

    Mathematics: Post your doubts here!

    For quadratic graphs...always find the vertex first....vertex can be calculated by the completed square form...or this formula vertex =(-b/2a , (4ac-b^2)/4a ) ...where ax^2+bx+c=0 is the quadratic equation... then....make a table....suppose the x coordinate of the vertex is 2.....put...
  11. M

    help required.!

    get higher A in p3 and s1..u may get A....or...for B...score B in both p3 and s1
  12. M

    any idea????

    after the result...!! may b 1 week after the result..!!
  13. M

    as sequence help please

    q3) n/2 {2a+1-n} = 3n/2 {2a+1-3n} to give a=4n-1/2 idk if its correct..since this one didnt match to ur answer.....!!
  14. M

    as sequence help please

    q1) rth term=1+4r...(r+1)th term=1+4(r+1)....now d=(r+1)th term- rth term= 4 rth term=1-4r or, a+(r-1)d=1+4r or, a+(r-1)4=1+4r or,a=5 now....sum of n terms = n/2 {2a+(n-1)d} out a=5 and d=4 and solve it q2) for sum=50 n/2{2a+(n-1)d}=50 and put n=20 to get...
  15. M

    Mathematics: Post your doubts here!

    for least |Z| ....the line starting from (0,0) and..perpendicular to the red line will b the least one.....!! and..now since...green line makes π/4 with the vertical line..i.e Y axis..means..the line has the equation y=-x...and therefore.....the pt at which green line and red line interest is...
  16. M

    Mathematics: Post your doubts here!

    well dude, m out somewhere..so no scanner here....!! so paper form not possible for me...!! well if u ask me..i always do these types of question graphically...so i dont know how to do the way u are doing.....!! so...u better ask others to make clear bout that way....!! if u want my...
  17. M

    Mathematics: Post your doubts here!

    m writing A for theta..!! x=sinA or, dx/dA=CosA or, dx=CosA.dA-----------1) now...substitute dx as CosA.dA.....and put SinA in x......then u will get the result.. put y=0 to find the limit...u will get x=0 and x=1...so put x=0 and 1..in X=sinA....to get A=0 and pi/2...
  18. M

    Mathematics: Post your doubts here!

    which one??? i didnt understand which question are u talking bout
  19. M

    Mathematics: Post your doubts here!

    X+1/lnx -x ...put 3 and 4 in this one...and look at the sign....the sign will change means...!! once it was decreasing and...other time its increasing...thus u have some stationary pt...!!
  20. M

    Mathematics: Post your doubts here!

    I didnot get what u are saying
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