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

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

Posted by Anshika Kumari 5 years, 1 month ago

CBSE > Class 12 > Mathematics

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Ex 4.1

Posted by Tushar Chaudhary 5 years, 1 month ago

CBSE > Class 12 > Mathematics

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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, 1 month ago

CBSE > Class 12 > Mathematics

1 answers

Itzz Aayu 5 years ago

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

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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, 1 month ago

CBSE > Class 12 > Mathematics

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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, 1 month ago

CBSE > Class 12 > Mathematics

3 answers

Nikhil Kumar 5 years, 1 month 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

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Shree Ram Faujdar 5 years, 1 month ago

How are you ji

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Shree Ram Faujdar 5 years, 1 month ago

Hello ji

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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, 1 month ago

CBSE > Class 12 > Mathematics

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tan²(sec–¹2) + cot²(cosec–¹3)=?

Posted by Shraddha ✨ 5 years, 1 month ago

CBSE > Class 12 > Mathematics

3 answers

Khushboo Gupta 5 years, 1 month 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)

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Khushboo Gupta 5 years, 1 month ago

11 answer hai

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Shree Ram Faujdar 5 years, 1 month ago

Ji kya likha hai kuch smj mein ni aya??

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Integration of sinx/1+ sinx

Posted by Richa Saha 5 years, 1 month ago

CBSE > Class 12 > Mathematics

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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, 1 month ago

CBSE > Class 12 > Mathematics

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stright line in space

Posted by Aakansha Choudhary 5 years, 1 month ago

CBSE > Class 12 > Mathematics

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How to find the value of tan (40°)

Posted by Ashish Mor 5 years, 1 month ago

CBSE > Class 12 > Mathematics

1 answers

Khushi Shahi 5 years, 1 month ago

By using formula tan(a+b)

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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, 1 month ago

CBSE > Class 12 > Mathematics

1 answers

Dhivya Shanthi 5 years, 1 month ago

853.58

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

Posted by Krish Kumar 5 years, 1 month ago

CBSE > Class 12 > Mathematics

2 answers

Mishti ???? 5 years, 1 month 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. ??

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Tannu Rao 5 years, 1 month 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.

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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, 1 month ago

CBSE > Class 12 > Mathematics

1 answers

Khushi Shahi 5 years, 1 month 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.

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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, 1 month ago

CBSE > Class 12 > Mathematics

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Intrgrate tanx+tan³x/1+tan³x

Posted by Manpreet Kaur 5 years, 1 month ago

CBSE > Class 12 > Mathematics

1 answers

Suryakant Swain 5 years ago

ln|secx|+c

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Define onto function

Posted by Bharat Choudhary 5 years, 1 month ago

CBSE > Class 12 > Mathematics

1 answers

Yogita Ingle 5 years, 1 month 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.