CBSE > Class 12 > Mathematics | CBSE Board | Homework Help

Let X=AB-BA Given A'=A and B'=B(as A and B are symmetric matrices) X'=(AB-BA)'=(AB)'-(BA)'=B'A'-A'B'=BA-AB=-(AB-BA)=-X Since X'=-X Therefore,X=AB-BA is a skew symmetric matrix if A and B are symmetric matrices

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Educationjone Rk Yadav 3 years, 7 months ago

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integrare dx/x^2 - 2x +1

Posted by Tanu . 3 years, 7 months ago

CBSE > Class 12 > Mathematics

3 answers

Ashutosh Tripathy 3 years, 7 months ago

Iintegrare dx/x^2 - 2x +1 =integration dx/(x-1)^2 =integration dt/t^2 =-1/t+c =-1/x-1+c

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Vivek Chaurasia 3 years, 7 months ago

Agr glat hua ho tho sryy but asa hii solve hoga.. ????

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Vivek Chaurasia 3 years, 7 months ago

Aree yrr..?‍♂️?‍♂️ Integrate 1/x^2-2x+1 = x^2 - 2x +1^ - 1^+2 =(x-1)^2 + root 5 pa whole square .. Abb yrr eska aaga solve kar loo espa humsa na ho paayega type karka???

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Maths ka sabse scoring chapter konsa h

Posted by Diti Urvija 3 years, 7 months ago

CBSE > Class 12 > Mathematics

2 answers

Satyam Suman 3 years, 7 months ago

Matrix and determinant

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Vivek Chaurasia 3 years, 7 months ago

Calculus ??

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Find second order derivative sin(logx)

Posted by Vishu Pundir 3 years, 7 months ago

CBSE > Class 12 > Mathematics

1 answers

Kapil Adhikari 3 years, 7 months ago

Y=sin(logx)

dy/dx=cos(logx) .1/x)

Now,by quotient rule

d²y/dx²=[x(-sin(logx).1/x)- cos(logx).1]/x²

d²y/dx²=[-sin(logx)-cos(logx)] /x²

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x^2 - y^2 = ?

Posted by Tripti Rawat 3 years, 7 months ago

CBSE > Class 12 > Mathematics

1 answers

Diti Urvija 3 years, 7 months ago

(x-y)(x+y)

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ANSWER

Kya koi chapter 1 explain kara sakta hai plzz

Posted by Abhijeet Singh 3 years, 7 months ago

CBSE > Class 12 > Mathematics

3 answers

Vivek Chaurasia 3 years, 7 months ago

One shot dekh le bhai... ??

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Queen Manisha 3 years, 7 months ago

Shashank vohara sir ne ye chapter bohot ache se kraya hain hain @ON YOU TUBE

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Queen Manisha 3 years, 7 months ago

https://youtube.com/playlist?list=PLOB4Q52rs1U7rM52Ih7plGyi_RseuRCjz

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Check whether the relation R in the set N of natural numbers given by R = {(a, b) : a is divisor of b} is reflexive, symmetric, or transitive. Also, determine whether R is an equivalence relation.

Posted by Badmalatha Velmurugan 3 years, 7 months ago

CBSE > Class 12 > Mathematics

1 answers

Sia ? 3 years, 7 months ago

Let there be a natural number n,
We know that n divides n, which implies nRn.
So, Every natural number is related to itself in relation R.
Thus relation R is reflexive .
Let there be three natural numbers a,b,c and let aRb,bRc
aRb implies a divides b and bRc implies b divides c, which combinedly implies that a divides c i.e. aRc.
So, Relation R is also transitive .
Let there be two natural numbers a,b and let aRb,
aRb implies a divides b but it can't be assured that b necessarily divides a.
For ex, 2R4 as 2 divides 4 but 4 does not divide 2 .
Thus Relation R is not symmetric .

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What Is the maximum value of ,(1) 28 (2) 20 (3) 21 (4) 40

Posted by Devki Singh 3 years, 7 months ago

CBSE > Class 12 > Mathematics

2 answers

Nikhil Kumar 3 years, 7 months ago

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Kush Nema 3 years, 7 months ago

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Maths lab manual observation solution

Posted by Nishant Yadav 3 years, 7 months ago

CBSE > Class 12 > Mathematics

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Solve the equation dy/dx =ycotx , given X=π/2, y=1

Posted by Aarti Rana 3 years, 7 months ago

CBSE > Class 12 > Mathematics

1 answers

Rajnish Yadav 3 years, 7 months ago

dy/dx=ycotx (separate variable both side) dy/y=cotx dx (Integration both side) logy=log(sinx)+c logy-log(sinx)=logc (loga-logb=loga/b) logy/sinx=logc y/sinx=c y=sinx(c)

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The probability that a bulb will fuse within an year is 0.05. Find the probability that out of 5 bulbs 3 bulbs will fuse within the year.

Posted by Aarti Rana 3 years, 7 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

If some one wants most important question in math class 12 then msg me on instagram I'd _prince_siddiki

Posted by Juber Khan 3 years, 7 months ago

CBSE > Class 12 > Mathematics

3 answers

Juber Khan 3 years, 7 months ago

Aap muja Instagram pa msg kar do ma vha bta dunga

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Preeti Yadav 3 years, 7 months ago

Yhi*

2Thank You

Preeti Yadav 3 years, 7 months ago

Thi btao do

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dy/dx=sinx

Posted by Subham Debnath 3 years, 7 months ago

CBSE > Class 12 > Mathematics

2 answers

Satyam Suman 3 years, 7 months ago

y = -cosx + c

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Juber Khan 3 years, 7 months ago

Cosx

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Show that the height of the right circular cylinder of greatest volume which can be inscribed in a right circular cone of height h and radius r is one-third of the height of the cone, and 4 9 times the volume of the cone.

Posted by Komal Ray 3 years, 7 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

Find minor and cofactor s of all the elements of the determinant |1 -3,4 3|

Posted by Ranjeet Verma 3 years, 7 months ago

CBSE > Class 12 > Mathematics

2 answers

Juber Khan 3 years, 7 months ago

Bhai cofactor square matrix ka hi nikalta h

1Thank You

Ajay Gupta 3 years, 7 months ago

.l.

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Guys Me Abhi 12 Me Aya Hun Mere Pass 2018 ka Edition Hai RD Sharma Ka.... New Edition Lu Ya Nahi Kuch Changes Hai Ki Nahi ???

Posted by Zeeshan Khan 3 years, 7 months ago

CBSE > Class 12 > Mathematics

3 answers

Satyam Suman 3 years, 7 months ago

Lene ki zarurt nhi h but kuch chapters and kuch topics jo delete hue h unhe mark kr lena aur mat krna

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Aarohi Singh 3 years, 7 months ago

No don't

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Abhijeet Singh 3 years, 7 months ago

Na mat lo

1Thank You

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I have done book one and I have done chapter 7 . I can pass Or not?

Posted by Harsh Kankarwal 3 years, 7 months ago

CBSE > Class 12 > Mathematics

3 answers

Satyam Suman 3 years, 7 months ago

You will pass definitely but i don't think you will score more than 58-60 in board exams

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Vivek Chaurasia 3 years, 7 months ago

DE, Vector, 3d,lp, probability are also important chapters. So i think it is not enough for u.. ?

1Thank You

Arpit Singh 3 years, 7 months ago

Not at all

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If a,b,c are unit vectors such that a+b+c = 0 .find the value of a•b +b•c + c•a

Posted by T Tanusree 3 years, 7 months ago

CBSE > Class 12 > Mathematics

4 answers

Abhishek Soni 3 years, 5 months ago

Given a+b+c=0 Take dot product of this with itself (a+b+c).(a+b+c)=0 a.a+a.b+a.c+b.a+b.b+b.c+c.a+c.b+c.c=0 On solving this, we get 3 + 2(a.b+a.c+b.c)=0 Hence (a.b+b.c+c.a)=-3/2

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Satyam Suman 3 years, 7 months ago

-3/2

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Divyaman Pal 3 years, 7 months ago

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Amit Yadav 3 years, 7 months ago

-3/2

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How to gain 90%in broad examination??

Posted by Anchal Sharma 3 years, 8 months ago

CBSE > Class 12 > Mathematics

2 answers

Harsh Kankarwal 3 years, 7 months ago

Right mahima

3Thank You

Mahima Pattanayak 3 years, 8 months ago

Solve all your ncert book and ncert exampler questions and if time permits solve last year sample papers too. It will help you in board examination

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How to solve fraction in power

Posted by Vibhuti Kumar 3 years, 8 months ago

CBSE > Class 12 > Mathematics

1 answers

Mahima Pattanayak 3 years, 8 months ago

Hope it helps. The base b raised to the power of n/m is equal to: bn/m = (m√b)n = m√(bn) Example: The base 2 raised to the power of 3/2 is equal to 1 divided by the base 2 raised to the power of 3: 23/2 = 2√(23) = 2.828

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3x/1+2x⁴ solve it exercise 7.4

Posted by Anchal Sharma 3 years, 8 months ago

CBSE > Class 12 > Mathematics

1 answers

Ashish Sharma 3 years, 8 months ago

Let x=t Then , 2xdx=tt xdx=tt/2 - Eqn[i] =3/2{tt/1+2t2 = 3/2{1/2(tt/t2+1/2) =3/4{tt/t2+1/underoot2) =3/4[1/(underoot2)(tan-[t/underoot2]) =3/4 (underoot2) [tan-(underoot2 t)] =3/4 x 2/(underoot2) [tan-(underoot2x2)] =3/(2underoot2) [tan- (underoot2x2)+C.

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What is the value of sin(11 1/4)° cos(11 1/4)°

Posted by Priyanshu Kaushik 3 years, 8 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

A bag contains 2 white and 1red ball. One ball is drawn at random and then put bach in the box after noting the colour of ball. The process is repeated again . If X denotes the number of red ball recorded in the two draws describe. I have of solution of this question but I don't know why here take white ball as W1 and W2

Posted by Domesh Soni 3 years, 8 months ago

CBSE > Class 12 > Mathematics

1 answers

Sia ? 3 years, 7 months ago

{tex}\text{Let 2 white ball be denoted by}~ w_1, w_{2}~ \& ~red~ ball~ by~ \mathrm{r}{/tex}
Then the sample space is
{tex}\mathrm{S}=\left\{\left(\mathrm{w}_{1}, \mathrm{w}_{1}\right),\left(\mathrm{w}_{2}, \mathrm{w}_{2}\right),\left(\mathrm{w}_{1}, \mathrm{w}_{2}\right)\right. \left(w_{2}, w_{1}\right),\left(r, w_{1}\right),\left(w_{1}, r\right) \left(r, w_{2}\right),\left(w_{2}, r\right) (r, r)\}{/tex}
Let X: Number of red balls in two draws
We can see there are 0 red, 1 red, and 2 red balls
{tex}So, X=0~ or ~X=1 ~or~ X=2{/tex}

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There are 3 categories of students in a class of 60 students A.very hard working B.regular but not so hardworking C.careless and irregular It's known that 10 students are in categoroy A 30 in categoroy B and rest in categoroy C.It is also found that probability of students of categories A unable to get good mark in final exam is 0.002 of categories B is 0.02 and of categories C is 0.20 Assume that a student selected at random was found to be the one who could not get good marks in the exam then the probability that this student is either of categories A or of categories B

Posted by Rosemary Thomas 3 years, 8 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

3sininverse x =sin inverse(3x-4x^3

Posted by ਸਹਿਜ ਸਿੰਘ 3 years, 8 months ago

CBSE > Class 12 > Mathematics

3 answers

Satyam Suman 3 years, 7 months ago

By the way this question is not in syllabus now

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Shubham Mishra 3 years, 8 months ago

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Shubham Mishra 3 years, 8 months ago

Let x=sin thita.............................(1) Sin inverse x=thita.....................(2) RHS- sin inverse (3x-4x^3), .................( Use 1) =Sin inverse (3sin thita-4sin^3thita), =Sin inverse (sin3 thita), =3 thita ..................... (Use 2) =3sin inverse x... L.H.S

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Is it necessary to use permutations and combinations formula in probability? Or can we use simple multiplication if we can?

Posted by Kajal Gupta 3 years, 8 months ago

CBSE > Class 12 > Mathematics