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

Take (2sinx + cosx) = t Differentiate both side w.r.t x d/dx(2sinx + cosx)=d/dx(t) 》2cosx - sinx = dt/dx 》》dx= dt/2cosx - sinx Now I= ∫(2cosx - sinx/2sinx + cosx) dx This can be written as: I= ∫(2cosx - sinx/t) dt/2cosx - sinx = ∫1/t dt = log|t|+C = log|2sinx + cosx| +C

2Thank You

ANSWER

Integration of 2cosx-sinx/2sinx+cos x

Posted by Anshika Kumari 5 years, 3 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

Ex 4.1

Posted by Tushar Chaudhary 5 years, 3 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

If tanA,tanB are the roots of x² - px + q =0 (where P,Q€R), then the value of sin²(A+B) =?

Posted by Shraddha ✨ 5 years, 3 months ago

CBSE > Class 12 > Mathematics

1 answers

Itzz Aayu 5 years, 3 months ago

sin^2(A+B)=P^2/(1-q)^2+p^2 i think it will be correct.....

0Thank You

ANSWER

Like apart from ulike book ? which helpbook will be useful to achieve good marks in board exam????❓??( Each subject and I am have commerce with maths)

Posted by Bhoomi ☺️?? 5 years, 3 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

prove that the greatest integer function f f i r given by f x is equal to square (of X is neither one word no round two wheeler accident notes the greatest integer less than or equal to X

Posted by Priyanka Dalai 5 years, 3 months ago

CBSE > Class 12 > Mathematics

3 answers

Nikhil Kumar 5 years, 3 months ago

f[1] = 1 f[1.2] = 1 f[1.9] = 1 f[1.99] = 1 Since different elements have same image 1 , f is not one - one CHECK ONTO , f(x) =[x] Let , y=f[x] y=[x] i.e , y= Greatest integer less than or equal to x . Hence , value of y will always come an integer . But y is a real number . Hence f is not onto

1Thank You

Shree Ram Faujdar 5 years, 3 months ago

How are you ji

0Thank You

Shree Ram Faujdar 5 years, 3 months ago

Hello ji

0Thank You

ANSWER

Write the sum of the principal diagonal elements of the inverse of matrix A . if A = [5 3 12 7],show that A² -12A - I =0 hence find the A–¹

Posted by Shraddha ✨ 5 years, 3 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

tan²(sec–¹2) + cot²(cosec–¹3)=?

Posted by Shraddha ✨ 5 years, 3 months ago

CBSE > Class 12 > Mathematics

3 answers

Khushboo Gupta 5 years, 3 months ago

Question=tan^2(sec^-1 2 )+ cot^2 (cosec^-1 3) Solution= sec^2(sec^-1 2)-1+cosec^2(cosec^-1 3)-1 = 2^2×1+3^2-2 =11(answer)

3Thank You

Khushboo Gupta 5 years, 3 months ago

11 answer hai

1Thank You

Shree Ram Faujdar 5 years, 3 months ago

Ji kya likha hai kuch smj mein ni aya??

2Thank You

ANSWER

Integration of sinx/1+ sinx

Posted by Richa Saha 5 years, 3 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

5. State with reason whether following functions have inverse: (i) : {1, 2, 3, 4} {10} with = {(1, 10), (2, 10), (3, 10), (4, 10)}

Posted by Anushka Chahar 5 years, 3 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

stright line in space

Posted by Aakansha Choudhary 5 years, 3 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

How to find the value of tan (40°)

Posted by Ashish Mor 5 years, 3 months ago

CBSE > Class 12 > Mathematics

1 answers

Khushi Shahi 5 years, 3 months ago

By using formula tan(a+b)

0Thank You

ANSWER

Subtract the sum of -5/7 and -8/3 from the sum of 5/2 and -11/12.

Posted by Karn Dev Singh Parihar 5 years, 3 months ago

CBSE > Class 12 > Mathematics

1 answers

Dhivya Shanthi 5 years, 3 months ago

853.58

1Thank You

ANSWER

How can I be a perfect in objective questions in section A of physics, chemistry,maths

Posted by Krish Kumar 5 years, 3 months ago

CBSE > Class 12 > Mathematics

2 answers

Mishti ???? 5 years, 3 months ago

By practising more objective one because after knowing the subjective part or theory sometimes we r not able to do them because of lack of deep knowledge of concept & main the practise of such type s of questions?? U can find diffrent websites objective questions to make strong u'r practice. Hope it will help u ?? Regards. ??

1Thank You

Tannu Rao 5 years, 3 months ago

For this, u must have proper understanding of basic concepts bcoz 1 markers usually test our understanding of a particular topic. Also u must have enough practice to have speed and accuracy both.

0Thank You

ANSWER

Prove that the relation R on the set z of all integer number defind by( x,y )€ R = x-y is divisible by z is an equivalance relation on z

Posted by Jashan Maan 5 years, 3 months ago

CBSE > Class 12 > Mathematics

1 answers

Khushi Shahi 5 years, 3 months ago

ANSWER R={(x,y:x,y∈z,x−yisdivisiblebyn}ForReflexive,x∈zSo⇒(x−x)isdivisiblebyn⇒(x,x)∈z So, Relation is Reflexive ForSymmetric⇒Let(x,y)∈R⇒(x−y)isdivisiblebyn.⇒nx−y=c,Remainderis0.⇒ny−x=−c,Remainderisalso0.⇒(y−x)isdivisiblebyn(y,x)∈RSo,RisSymmetric.ForTransitive⇒Let(x,y)∈R&(y,z)∈R⇒(x−y)isdivisiblebyn⇒(y−q)isdivisiblebyn add both these equation (i) & (ii) (x−y)=xc,c∈z−v,(y−q)=na,(a∈z)⇒(x−y+y−q)=nc+na,c,a∈z⇒(x−q)=n(a+c),c,a∈z(x−q)isdivisiblebyn⇒(x,q)∈R So, R is Transitive So, the R is Reflexive, Symmetric and Transitive Then it is Equivalence Relation.

0Thank You

ANSWER

Show that each of the relation R in the set A={5,6,7,8,9}, given by ? = {(? , ?):|? − ?| ?? ? ???????? ?? 2}. Find the set of all elements related to 6 in each case.

Posted by Yazhini Raja 5 years, 3 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

Intrgrate tanx+tan³x/1+tan³x

Posted by Manpreet Kaur 5 years, 3 months ago

CBSE > Class 12 > Mathematics

1 answers

Suryakant Swain 5 years, 3 months ago

ln|secx|+c

0Thank You

ANSWER

Define onto function

Posted by Bharat Choudhary 5 years, 3 months ago

CBSE > Class 12 > Mathematics

1 answers

Yogita Ingle 5 years, 3 months ago

Onto function could be explained by considering two sets, Set A and Set B, which consist of elements. If for every element of B, there is at least one or more than one element matching with A, then the function is said to be onto function or surjective function. The term for the surjective function was introduced by Nicolas Bourbaki.