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Catalogs Discussion Forums -> Differential Calculus -> evaluate -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

Thank u atul :)

Catalogs Discussion Forums -> Trignometry -> Trigonometric ratios of compound angles -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
I guess, the question is already solved.

Nudge me, if its not

Catalogs Discussion Forums -> Trignometry -> 2/cos2a-1/cos4a-2/sin2a+1/sin4a=cot4a-tan4a -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
What has to be done with this ?
Catalogs Discussion Forums -> Algebra -> Modulus function -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
|x-3| should not be 0 => x should not = 3
 

Also, 3x2 - 10x + 3 = 0
 
=>  3x2 - 9x - x + 3 = 0
=>  (3x-1)(x-3) = 0
=>   x = 1/3

Catalogs Discussion Forums -> Integral Calculus -> integration of (sinx+cosx)/(sin^2x+cos^4x) -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
beautifully solved Jagdish :)

Thanks for sharing the work

Catalogs Discussion Forums -> Differential Calculus -> Friends can u help me with some tricks in trigonometry and differntial calculus -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
practice as much as u can, and u'll develop ur own tricks and strategies to solve the question
Catalogs Discussion Forums -> Integral Calculus -> integration -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
y2+ 2xy + 40|x| = 400

Case 1: x > 0
      y2+ 2xy + 40x = 400
=>  (y2+ 2xy + x2) - (x2- 40x + 400) = 0
=> (y+x)2 - (x-20)2 = 0
=>   (y+2x-20) (y+20) = 0

The two lines are shown on the graph, in green. Since x> 0 , the area bounded is that by the triangle PQC.

Similarly, when x< 0 (Case 2) ,
The two lines are those shown in red, and the area bounded is that by triangle APQ

therefore, the area bounded = 20X 40 = 800 sq units


Catalogs Discussion Forums -> Analytical Geometry -> Circles -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

     x2+y2-6x-10y+c=0
=>  (x-3)2+ (y-5)2 = 34-c
=> radius = sqrt (43-c)

Now(1,4) is an interior point
=>  (1-3)2+ (4-5)2 -(34-c) < 0
=>  c < 29

The circle doesnt touch the co-ordinate axes
=>the distance of centre from each of the axis > radius of circle
=> sqrt (34-c) < 3    and  sqrt (34-c) < 5 
=> c> 25

combining, 25< c < 29


Catalogs Discussion Forums -> Coaching Institutes & Course Material -> Individual teachers or coaching to remove only doubts, not regular coaching -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

teachers are not really necesaary for solving the doubts, u can ask ur friends or some othr batch mates, to discuss the problems with u, n solve them thru discussion only.

the choice between the two, depends on u totally... u can post ur doubts here at goiit.com ...we'll try to solve it for u :)

Catalogs Discussion Forums -> Algebra -> rasio of 2 -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

whats the question???

Catalogs Discussion Forums -> Algebra -> if p(x)=x4+ax3+bx2+cx+d and p(1)=p(2)=p(3)=0 find p(4) -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

are u sure, thr is no other condition specified??

Catalogs Discussion Forums -> Algebra -> Mind blender -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

well done hemang, beautifully solved :)

Catalogs Discussion Forums -> Coaching Institutes & Course Material -> need a good book on integral calculus? -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

for board exams, go thru the NCERT book, and for othr exams, try arihant  or TMH!

Catalogs Discussion Forums -> Algebra -> Complex numbers - Work these sums out please..!! -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
Let z be a complex number satisfying z4 + z3 + 2z2 + z + 1 = 0, then find the value of |z|

 
       z4 + z3 + 2z2 + z + 1 = 0
=> (z4 + 2z2 + 1) + (z3+z) = 0
=>   (z4 + 2z2 + 1) + z(z2+1) = 0
=> (z2+1)2 + (z2+1) = 0
=> (z2+1)(z2+z+1) = 0

Case 1:
      (z2+1)= 0
=>  z = + i or -i

Case 2:
      z2+z+1 = 0
=> (z2+z+ 1/4) + 3/4 = 0
=> (z+1/2)2 = -3/4
=>  (z+1/2) =(+/-) i (sqrt3)/2
=>   z =(-1/2) (+/-) i (sqrt3)/2


Catalogs Discussion Forums -> Trignometry -> find -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]
 from the figure,  tan-1x  = @ (assume)
then sin(tan-1x) = sin @ = x/(1+x2)
 
Catalogs Discussion Forums -> Integral Calculus -> what will be the graph of y=tansquaredx -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

 

Catalogs Discussion Forums -> Differential Calculus -> can u give me information about differentiblity and continuty -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

 go thru any text book, NCERT is the most basic one...arihant, TMH ne will do!

Catalogs Discussion Forums -> Trignometry -> hw to store the tig formulaes....and its graphs.......and limits -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

 whr do u want to store the formulas, prasanth?

Catalogs Discussion Forums -> Algebra -> Maths Challenging Question For IIT aspirants -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

 

Catalogs Discussion Forums -> Algebra -> socho socho... -> Go to message
This Post 0 points    (Olaaa!! Perrrfect answer.   in 0 votes )   [?]

 
 
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