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

Ask questions which are clear, concise and easy to understand.

Ask Question

Integartiondx/3sinx+cosx+2

Posted by Azhar Uddin 4 years, 4 months ago

1 answers

8D Bass Nation 4 years, 4 months ago

I = ʃ dx / (2sin x + cos x + 3) = ʃ dx / [2(sin x + 1) + (cos x + 1)] = ʃ dx / [2{cos (x / 2) + sin (x / 2)}^2 + 2 {cos (x / 2)}^2] = (1 / 2)*ʃ dx / [{cos (x / 2) + sin (x / 2)}^2 + {cos (x / 2)}^2] = (1 / 2)*ʃ {sec (x / 2)^2}*dx / [1 + [1 + {tan (x / 2)}^2]] Multiplying both numerator and denominator by {sec (x/2)^2}. Let, z = [1 + tan (x/2)]; so, dz = (1 / 2)*[{sec (x/2)}^2]*dx So, I = ʃ dz / {1 + (z^2)} = tan -1 z + K = tan -1 {1 + tan (x / 2)} + K

0Thank You

ANSWER

tan-1(2x)+tan-1(3x)=π/2 then what is the value of x

Posted by Harshita Patidar 4 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Ayush Vishwakarma?? 4 years, 4 months ago

Apply tan^-1A+tan^-1B formula.=Tan^-1 A+B /1-A*B.

0Thank You

ANSWER

2 -6 by 1 -2 row transformation

Posted by Pavit Singh 4 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

Find tge value of x from the following [ 1 x 1] [1 3 2] [1] [2 5 1] [2] [15 3 2 ] [x]

Posted by Namitha Gireesh 4 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

Differentiate wrt x ,y=x^e^-x^2

Posted by Somanath Nambiar 4 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Ankit Singh 4 years, 4 months ago

x^e^-x^2(e^xlogx+e^x/x)

1Thank You

ANSWER

Let A be a 3*3 determinant and |A|=7.Find the value of |2A|

Posted by Bhimansh Garg 4 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

8D Bass Nation 4 years, 4 months ago

|2A| = 2×7 =14 ..it's jst that simple

0Thank You

ANSWER

Evaluate intration dx/(1-dxsquare

Posted by Vaishnavi Gupta 4 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

If Y is equal to 10 raise to minus 1 the whole root of 1 - sin x by 1 + sin x then the value of DY by DX at x is equal to pi by 6 is

Posted by Aleena Babu 4 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

All the inverse trigonometric formulae

Posted by Saranya Raja 4 years, 4 months ago

CBSE > Class 12 > Mathematics

2 answers

Saranya Raja 4 years, 4 months ago

Thank u

0Thank You

Ankita ?? Arpita☺️ 4 years, 4 months ago

Prefer gooGle better!!

0Thank You

ANSWER

If A=(2 7 1 9), prove that: |5A| = 25|A|.

Posted by Muskan Batra 4 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

3.2 savthyay

Posted by Chirag Makwana 4 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Khushi....? ??‍? 4 years, 4 months ago

What do you mean to say....

3Thank You

ANSWER

IfA=[2,3,4,5]then write the relation R on A where R=[(a, b) :a+b=6]

Posted by Manisha Kumari 4 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Ayush Vishwakarma?? 4 years, 4 months ago

R=[(2,4):2+4=6] and [(4,2):4+2=6]

1Thank You

ANSWER

In the matrix multiplication A×B=C , the order of B is 2×3 and the order of C is 4×3 . What is the order of matrix A ?

Posted by Jashan Chaudhary 4 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Ayush Vishwakarma?? 4 years, 4 months ago

[Order of A is(4×2)]and B has 2×3 =C which has order of 4×3. When order of column of first set is equal to the order of row of 2nd set then multiplication is valid in matrices.

1Thank You

ANSWER

a*b = a+b-ab is commutatibe and associative prove

Posted by Ruheen Sk 4 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Ayush Vishwakarma?? 4 years, 4 months ago

Binary operation is removed from syllabus.

1Thank You

ANSWER

567788567655687644+123456780987654321

Posted by Sunil Swami 4 years, 4 months ago

CBSE > Class 12 > Mathematics

5 answers

Ayush Vishwakarma?? 4 years, 4 months ago

1Thank You

Ankita ?? Arpita☺️ 4 years, 4 months ago

Yes ,khusi,??

3Thank You

Khushi....? ??‍? 4 years, 4 months ago

Chhote bachhe apne class me hi questions puchhe to jyada better hoga....??????

3Thank You

Ankita ?? Arpita☺️ 4 years, 4 months ago

What is this..

2Thank You

Sunil Swami 4 years, 4 months ago

Ffd that rtjfxmyd

0Thank You

ANSWER

Please help to me maths ncert chapter 6 increasing or decreasing function

Posted by Bhoomi Mishra 4 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Khushi....? ??‍? 4 years, 4 months ago

In which question you have the problem....

1Thank You

ANSWER

Can anybody tell me how to study in class 12 to score 95+? I want one timetable. Anyone please help....

Posted by Pooja ... 4 years, 4 months ago

CBSE > Class 12 > Mathematics

2 answers

Pooja ... 4 years, 4 months ago

Please make a timetable for me. I study with concentration but want consistency.. Help me ...

1Thank You

Shruti Duddi 4 years, 4 months ago

Just study with concentration .....Timetable should dit your timing.. U may decide....But .....ONE THING IS MUST THAT IS CONCENTRATION..

3Thank You

ANSWER

6.2 6 question

Posted by Manish Giri 4 years, 4 months ago

CBSE > Class 12 > Mathematics

2 answers

Ankita ?? Arpita☺️ 4 years, 4 months ago

You find on this app

1Thank You

Ankita ?? Arpita☺️ 4 years, 4 months ago

First find f'x Thentake f'x=0 then you get interval..

1Thank You

ANSWER

Show that the function f:A---B defined as f(x)= 3x+4/5x-7 where A= R -{7/5},B=R-{3/5} is invertible and hence find f^-1

Posted by Ruheen Sk 4 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

Let f:R-{-4/3}---R-{4/3} be a function given by f(x)=4x/3x+4 .Show that f is invertible with f^-1 (x)=4x/4-3x

Posted by Ruheen Sk 4 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

Show that the function f(x)=|x| is not differentiable at x=0

Posted by Mallikarjun Patil 4 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Gaurav Seth 4 years, 4 months ago

Given values :

The function f(x) = x is continuous at x = 0.

To Prove :

That the function f(x)=x is continuous at x=0, but not differentiable at

x = 0.

Solution :

First of all prove :

We know that :

Note :

If this is required then use!

Then,

So,

Now,

To Represent :

So,

Did you observe?

So, You should obesreve! that,

The limit from the right is 1 while the limit from the left is - 1.

Hence,

The two sided limit does not exist.

That is, the derivative does not exist at x = 0

0Thank You

ANSWER

Check the following function for one one and onto (a). f:R---R f(x)= 2x-3/7 (b).f:R---R f(x)= |x+1| f:R-{2} --- R,f(x)=3x-1/x-2 (d).f:R----1,1],f(x)= sin^x

Posted by Ruheen Sk 4 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

If df(x)/dx=f(x) and f(1)=2 then f(3) is equal to

Posted by Pradeep K V 4 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

Find the value of tan(sin3|5)+cot (3/2)

Posted by Supritha Supri 4 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Khushi....? ??‍? 4 years, 4 months ago

Is your question correct.....

2Thank You

ANSWER

Chapter 5. Exercise 5.5 Questions no 7

Posted by 09 Ajay Prakash Tiwari 4 years, 4 months ago

CBSE > Class 12 > Mathematics

2 answers

Mr. Badmash 4 years, 4 months ago

Given :- y =( log x) ^x + x^(log x) Let, y = u + v , then solve u and v individually by taking logarithms both side

0Thank You

Khushi....? ??‍? 4 years, 4 months ago

Refer google for full ncert solutions or check on this app....

1Thank You

ANSWER

Integrals question solve karne ke liye Main property kya hai or kon kon si hai

Posted by Ravi Kushwaha 4 years, 4 months ago

CBSE > Class 12 > Mathematics

2 answers

Ravi Kushwaha 4 years, 4 months ago

Thanks OK by

2Thank You

Khushi....? ??‍? 4 years, 4 months ago

Book me dekh lijiye properties of integration...

3Thank You

ANSWER

if A=| 1 2 0, - 1 5 2, 0 3 1 | find A^-1 by elementary row transformation

Posted by Sanskar Pani 4 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

X²(1-1/x²)dx integerets

Posted by Atif Awais 4 years, 4 months ago

CBSE > Class 12 > Mathematics

4 answers

Khushi....? ??‍? 4 years, 4 months ago

Okk lets do one thing u know the question is x^2(1-1/x^2)dx....so when we take LCM of x^2 it will become x^2(x^2-1)/x^2 then x^2 will be cancelled out and we get (x^2-1)dx on solving this we get the answer x^3/3 - x+ c.....

1Thank You

Mr. Badmash 4 years, 4 months ago

I'm unable to solve it

1Thank You

Mr. Badmash 4 years, 4 months ago

How khusi plz explain full solution

1Thank You

Khushi....? ??‍? 4 years, 4 months ago

x^3/3 - x + c......

1Thank You

ANSWER

X²(1-1/x)dx