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If A=[1 3 3] 1 4 3 1 3 4,then verify that A adj A= |A|I.find A^-1

Posted by Hunny Bhardwaj 5 years, 2 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

Elementary row transformation of 3*3 -1 1 2. 1 2 3. 3 1 1

Posted by Gaurav Gaming 5 years, 2 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

Ya khushi di In this year i came in 12 But why u ask ?? ??

Posted by Mishti ???? 5 years, 2 months ago

CBSE > Class 12 > Mathematics

5 answers

Khushi....? ??‍? 5 years, 2 months ago

Thanku cutiepie...mishti...❤❤??

Mishti ???? 5 years, 2 months ago

I m upset because i have studied the main topics with my all efforts & it is now deducted ????? Now i see the whole changes?? &,I m also be happy if the syllabous is not reduced☺☺ Main topics mean a lot to are future comptetion exams or knowledge is the thing which how more we take it it is good for us?? Di i wish for u a good future ??? I know u got nice marks in boards. Regards. ??

Khushi....? ??‍? 5 years, 2 months ago

Just for knowing.....u cutiepie.....I have pessed 12th that's why I asked and truely for that I don't need any deduction in my syllabus.....???

Baso Lal 5 years, 2 months ago

What

Rishab Jain 5 years, 2 months ago

???

ANSWER

(x^4 - 1)/(x-1) dx

Posted by Nithish S 5 years, 2 months ago

CBSE > Class 12 > Mathematics

1 answers

Khushi....? ??‍? 5 years, 2 months ago

x^4/4 + x^3/3 + x^2/2 + x + c......

ANSWER

Show 1= 2

Posted by Gopal Nayar 5 years, 2 months ago

CBSE > Class 12 > Mathematics

2 answers

Gopal Nayar 5 years, 2 months ago

Let a =b a×a = b×a a^2 - b^2 = b×a - b^2 (a - b )(a + b) = b( a - b ) a+ b = b b + b = b 2b = b 2 = 1 proved.

8D Bass Nation 5 years, 2 months ago

1=2: A Proof using Beginning Algebra The Fallacious Proof: Step 1: Let a=b. Step 2: Then a²=ab, Step 3: a²+a²=a²+ab, Step 4: 2a²=a²+b Step 5: 2a²-2ab=a²+ab-2ab Step 6: and 2a²-2ab=a²-ab. Step 7: This can be written as 2(a²-ab)=1(a²-ab), Step 8: and cancelling the a²-ab from both sides gives 1=2.

ANSWER

7+8

Posted by Ayush Vatsal 5 years, 2 months ago

CBSE > Class 12 > Mathematics

5 answers

Rishab Jain 5 years, 2 months ago

Nice ques. ,Kidding ? ?? ask questions which is important not for time pass

Vishal Sharma 5 years, 2 months ago

It is very hard question which is important for jee advance ????????

Insha Khalid 5 years, 2 months ago

15

Gaurav Gaming 5 years, 2 months ago

15

Gopal Nayar 5 years, 2 months ago

15

ANSWER

Use elementry transformations find inverse

Posted by Prapti Kumari 5 years, 2 months ago

CBSE > Class 12 > Mathematics

1 answers

Gaurav Seth 5 years, 2 months ago

How do you find inverse using elementary transformation?

But we can only do these "Elementary Row Operations":

swap rows.
multiply or divide each element in a a row by a constant.
replace a row by adding or subtracting a multiple of another row to it.

ANSWER

Differentiate the following w.r.t ,or 2^ sinx

Posted by Fillbestar Jaba Jaba'S Blood 5 years, 2 months ago

CBSE > Class 12 > Mathematics

1 answers

Sayani Manna 5 years, 2 months ago

Let, y=2^(sinx) Step 1: Taking logarithm to both sides, log y = log {2^(sinx)} Or, log y =(sinx).(log 2) Step 2: Differentiating both sides w.r.t. x, (1/y)(dy/dx)= (sinx).(d/dx)(log 2) + (log 2 ).(d/dx)(sin x ) Or, dy/dx ={ 0 + (log 2). (cos x)}y Or, dy/dx = 2^(sin x ).(cos x).(log 2)

ANSWER

Kya ap Muje bta skte h

Posted by Kanchan Singh 5 years, 2 months ago

CBSE > Class 12 > Mathematics

4 answers

Kanchan Singh 5 years, 2 months ago

Only 3.4

Mishti ???? 5 years, 2 months ago

Only 3.4 is reduced dear

Kanchan Singh 5 years, 2 months ago

According to new syllabus class 12 th third chapters kon konsi exercise nhi krni

Khushi....? ??‍? 5 years, 2 months ago

Kya

ANSWER

Is inverse trigonometry misc. exercise also not in syllabus?.

Posted by Smile Josan 5 years, 2 months ago

CBSE > Class 12 > Mathematics

3 answers

Fanishwar Goutam 5 years, 2 months ago

Trigonometry ki exercise 8.3 nhi aa rahe h

Aaiman Farhin 5 years, 2 months ago

What is eliminated from the syllabus.

Khushi....? ??‍? 5 years, 2 months ago

It is in the syllabus

ANSWER

Find the angle between the two lines whose direction cosines are given by the equation l+m+n=0, l^2+m^2+n^2=0

Posted by Akash Pandey 5 years, 2 months ago

CBSE > Class 12 > Mathematics

1 answers

Gaurav Seth 5 years, 2 months ago

Answer : π/3

We know that angle between two lines is

l +m +n= 0
⇒ l = - (m+n)
⇒ (m+n)² = l²
⇒ m² +n² +2mn = m² +n²
[∵ l² = m² +n², given]
⇒ 2mn = 0
when m = 0 ⇒ l =-n
Hence, (l, m, n) is (1,0-1)
When n =0, then l =-m
Hence, (l,m,n) is (1,0-1)

We know that angle between two lines is

l +m +n= 0
⇒ l = - (m+n)
⇒ (m+n)² = l²
⇒ m² +n² +2mn = m² +n²
[∵ l² = m² +n², given]
⇒ 2mn = 0
when m = 0 ⇒ l =-n
Hence, (l, m, n) is (1,0-1)
When n =0, then l =-m
Hence, (l,m,n) is (1,0-1)

ANSWER

Congratulations!?? Guys For 30 % syllabous reduction?? ??

Posted by Mishti ???? 5 years, 2 months ago

CBSE > Class 12 > Mathematics

5 answers

Anuj Kaushik 5 years, 2 months ago

Glad to hear that. ??

Aaiman Farhin 5 years, 2 months ago

Congrats to all

Suman Sharma 5 years, 2 months ago

Same to you mishti???

Khushi....? ??‍? 5 years, 2 months ago

Mishti kya aap is year 12 me gyi ho...

Mr. Badmash 5 years, 2 months ago

Same to you mishti??

ANSWER

The volume of a cube is increasing at the rate of 8cm^3/sec. How fast is the surface area increasing when the length of an edge is 12cm?

Posted by Jasveer Gangwar 5 years, 2 months ago

CBSE > Class 12 > Mathematics

1 answers

Yogita Ingle 5 years, 2 months ago

volume of cube is increasing at the rate of 8cm³/s. e.g.,
edge length , a = 12cm

we know volume of cube , V = a³
now differentiate with respect to time,

put a = 12cm and dV/dt = 8cm³/s
now, 8 = 3(12)² da/dt
8 = 3 × 144 × da/dt
=> da/dt = 1/54 cm/s -----(1)

we also know surface area of cube , A = 6a²
differentiate A with respect to time,
dA/dt = 12a da/dt

put a = 12cm and from equation (1),
so, dA/dt = 12 × 12 × 1/54 = 144/54 = 8/3

hence, rate of change of surface area of cube is

ANSWER

Find LhL and RHL of f(x)=|x|÷x at x=0

Posted by Saurabh Tripathi 5 years, 2 months ago

CBSE > Class 12 > Mathematics

1 answers

8D Bass Nation 5 years, 2 months ago

Ex 5.1,8 teachoo.com Find all points of discontinuity off, where fis defined by 1x f(x) = if x = 0 10, if x = 0 Since we need to find continuity at of the function We check continuity for different values of x When x = 0 When x>0 When x<0 Since there are two different Case 1: When x = 0 f(x) is continuous at x = = 0 functions on the left & right of o, we take LHL & RHL. if L.H.L = R.H.L= f(0) if f lim f(x) lim f(x) = f(0) X-0- X-07 LHL at x → 0 RHL at x 0 lim f(x) = lim f(0 - h) X-0 h-0 lim f(x) = lim f(0 + h) h-0 x0+ = lim f(-h) h→0 = lim f(h) h→0 -h| = lim h→0 -h Th1 = lim h0 h h = lim h-h h = lim h-oh = lim -1 h-0 - lim 1 h→0 = 1 = -1 Since L.H.LR.H.L f(x) is not continuous at x = 0 Case 2: When x < 0 For x<0, f(x) = L x 1 (-x) f(x) = (As x < 0, x is negative) f(x) = -1 Since this constant It is continuous .. :: f(x) is continuous for x < 0 Case 3: When x > 0 For x>0, 1x f(x) - X х f(x) = X f(x) = 1 (As x > 0, x is positive) Since this constant It is continuous . :: f(x) is continuous for x > 0 Hence, only x = 0 is point is discontinuity. :: f is continuous for all real numbers except 0. Thus, f is continuous for x ER-{0}

ANSWER

Integartiondx/3sinx+cosx+2

Posted by Azhar Uddin 5 years, 2 months ago

CBSE > Class 12 > Mathematics

1 answers

8D Bass Nation 5 years, 2 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

ANSWER

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

Posted by Harshita Patidar 5 years, 2 months ago

CBSE > Class 12 > Mathematics

1 answers

Ayush Vishwakarma?? 5 years, 2 months ago

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

ANSWER

2 -6 by 1 -2 row transformation

Posted by Pavit Singh 5 years, 2 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 5 years, 2 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

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

Posted by Somanath Nambiar 5 years, 3 months ago

CBSE > Class 12 > Mathematics

1 answers

Ankit Singh 5 years, 2 months ago

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

ANSWER

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

Posted by Bhimansh Garg 5 years, 3 months ago

CBSE > Class 12 > Mathematics

1 answers

8D Bass Nation 5 years, 2 months ago

|2A| = 2×7 =14 ..it's jst that simple

ANSWER

Evaluate intration dx/(1-dxsquare

Posted by Vaishnavi Gupta 5 years, 3 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 5 years, 3 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

All the inverse trigonometric formulae

Posted by Saranya Raja 5 years, 3 months ago

CBSE > Class 12 > Mathematics

2 answers

Saranya Raja 5 years, 2 months ago

Thank u

Ankita ?? Arpita☺️ 5 years, 3 months ago

Prefer gooGle better!!

ANSWER

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

Posted by Muskan Batra 5 years, 3 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

3.2 savthyay

Posted by Chirag Makwana 5 years, 3 months ago

CBSE > Class 12 > Mathematics

1 answers

Khushi....? ??‍? 5 years, 3 months ago

What do you mean to say....

ANSWER

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

Posted by Manisha Kumari 5 years, 3 months ago

CBSE > Class 12 > Mathematics

1 answers

Ayush Vishwakarma?? 5 years, 3 months ago

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

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 5 years, 3 months ago

CBSE > Class 12 > Mathematics

1 answers

Ayush Vishwakarma?? 5 years, 3 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.

ANSWER

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

Posted by Ruheen Sk 5 years, 3 months ago

CBSE > Class 12 > Mathematics

1 answers

Ayush Vishwakarma?? 5 years, 3 months ago

Binary operation is removed from syllabus.

ANSWER

567788567655687644+123456780987654321

Posted by Sunil Swami 5 years, 3 months ago

CBSE > Class 12 > Mathematics

5 answers

Ayush Vishwakarma?? 5 years, 3 months ago

??

Ankita ?? Arpita☺️ 5 years, 3 months ago

Yes ,khusi,??

Khushi....? ??‍? 5 years, 3 months ago

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

Ankita ?? Arpita☺️ 5 years, 3 months ago

What is this..

Sunil Swami 5 years, 3 months ago

Ffd that rtjfxmyd

ANSWER

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

Posted by Bhoomi Mishra 5 years, 3 months ago

CBSE > Class 12 > Mathematics

1 answers

Khushi....? ??‍? 5 years, 3 months ago

In which question you have the problem....

ANSWER

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