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Find the area of the triangle formed by the lines x=0 ,y=1 and 2x+y=2 .

Posted by Kritika Sen 5 years, 8 months ago

CBSE > Class 11 > Mathematics

0 answers

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What is a improper subset?

Posted by Satvik Sharma 7 years, 5 months ago

CBSE > Class 11 > Mathematics

1 answers

Nancy Rajput 7 years, 5 months ago

every set is a subset of itself and the empty set is also the subset of every set it is known as improper subset

3Thank You

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What is a^2+b^2

Posted by Madhan Shankaran 7 years, 5 months ago

CBSE > Class 11 > Mathematics

1 answers

Nancy Rajput 7 years, 5 months ago

(a + b)^2 = a^2 + b^2 + 2ab (a - b)^2 = a^2 + b^2 - 2ab So, a^2 + b^2 formula can be a^2 + b^2 = (a + b)^2 - 2ab a^2 + b^2 = (a - b)^2 + 2ab

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DE MORGAN'S law proof

Posted by Vinayak Raj 7 years, 5 months ago

CBSE > Class 11 > Mathematics

2 answers

Nancy Rajput 7 years, 5 months ago

Proof of De Morgan’s law: (A ∩ B)' = A' U B' Let M = (A ∩ B)' and N = A' U B' Let x be an arbitrary element of M then x ∈ M ⇒ x ∈ (A ∩ B)' ⇒ x ∉ (A ∩ B) ⇒ x ∉ A or x ∉ B ⇒ x ∈ A' or x ∈ B' ⇒ x ∈ A' U B' ⇒ x ∈ N Therefore, M ⊂ N …………….. (i) Again, let y be an arbitrary element of N then y ∈ N ⇒ y ∈ A' U B' ⇒ y ∈ A' or y ∈ B' ⇒ y ∉ A or y ∉ B ⇒ y ∉ (A ∩ B) ⇒ y ∈ (A ∩ B)' ⇒ y ∈ M Therefore, N ⊂ M …………….. (ii) Now combine (i) and (ii) we get; M = N i.e. (A ∩ B)' = A' U B'

Nancy Rajput 7 years, 5 months ago

Proof of De Morgan’s law: (A U B)' = A' ∩ B' Let P = (A U B)' and Q = A' ∩ B' Let x be an arbitrary element of P then x ∈ P ⇒ x ∈ (A U B)' ⇒ x ∉ (A U B) ⇒ x ∉ A and x ∉ B ⇒ x ∈ A' and x ∈ B' ⇒ x ∈ A' ∩ B' ⇒ x ∈ Q Therefore, P ⊂ Q …………….. (i) Again, let y be an arbitrary element of Q then y ∈ Q ⇒ y ∈ A' ∩ B' ⇒ y ∈ A' and y ∈ B' ⇒ y ∉ A and y ∉ B ⇒ y ∉ (A U B) ⇒ y ∈ (A U B)' ⇒ y ∈ P Therefore, Q ⊂ P …………….. (ii) Now combine (i) and (ii) we get; P = Q i.e. (A U B)' = A' ∩ B'

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There's no way to explain the topic. Please explain hard topics

Posted by Yashwant Singh 7 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

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anyone help me in maths its urgent of chapter relation

Posted by Nancy Rajput 7 years, 5 months ago

CBSE > Class 11 > Mathematics

5 answers

Yash Thakur 7 years, 5 months ago

9 elements A×A some order pair (-1,0) (0,1). Now we notice order pair that -1,0,1. Given elements are (-1,0)(0,1). A has three elements. A={-1,0,1} A×A = { -1,0,1}×{-1,0,1} Hence, remaining elements of A×A-- {(-1,0) (0,-1) (0,0) (1,-1) (-1,-1) (1,0) (1,1)}. ????

Nancy Rajput 7 years, 5 months ago

in last how remaining elements is find

Nancy Rajput 7 years, 5 months ago

expercise 2.1 question no 10 i cant understand it pls you explain me

Shivam Tiwari 7 years, 5 months ago

I am help you

Shivam Tiwari 7 years, 5 months ago

Yes iIcan help u

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Lesson 2(c) 11

Posted by Suraj Thakur 7 years, 5 months ago

CBSE > Class 11 > Mathematics

1 answers

Suraj Thakur 7 years, 5 months ago

Lesson 2(c) qusiton no. 11 ka

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How we will find tan 40?

Posted by Abhishek Singh 7 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

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Properties of modulus and conjugate of a complex number

Posted by Janaranjan Yengkokpam 7 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

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Z+1=z+2(1+¡)

Posted by Anshul Yadav 7 years, 5 months ago

CBSE > Class 11 > Mathematics

1 answers

Nancy Rajput 7 years, 5 months ago

what we find in this question the value of Z or whay

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De morgan law

Posted by Bhanu Pratap Bhanu Pratap 7 years, 5 months ago

CBSE > Class 11 > Mathematics

4 answers

Nancy Rajput 7 years, 5 months ago

ohh sorry its (A union B)'

Mitesh Tiwari 7 years, 5 months ago

answer of nancy rajput was incorect

Nancy Rajput 7 years, 5 months ago

(A union B) =A' intersection B'

Mitesh Tiwari 7 years, 5 months ago

(A union B)'= A' intersection B'

ANSWER

2-2+4-3×3

Posted by Pankaj Payal 5 years, 8 months ago

CBSE > Class 11 > Mathematics

3 answers

Pammy Kumari 7 years, 5 months ago

-5 is correct answer

Nancy Rajput 7 years, 5 months ago

its -5

Lovely Dhawan 7 years, 5 months ago

-5

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Hii friends i wanna urs help i was absent in my April classes so i wanna to learn the chapter sets i am so confused so could you help me????

Posted by Vanisha Meena 7 years, 5 months ago

CBSE > Class 11 > Mathematics

4 answers

Vanisha Meena 7 years, 5 months ago

From starting

Prabhat Emmanuel 7 years, 5 months ago

U can take help from online lecture

Tapan Pandey 7 years, 5 months ago

Yeah

Arpit Pathak 7 years, 5 months ago

Which part dear

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In fig d is a point on hypotenus AC of triangle ABC such that. BD prependiu to AC , DMis perpendicular to BC and Dn perpendicular AB prove thatt DMsquare =DN .MC DN square=DM .Am

Posted by Kamal Thakur 7 years, 5 months ago

CBSE > Class 11 > Mathematics

1 answers

Vanisha Meena 7 years, 5 months ago

Where is the fig

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Long powerful at the base of X - 1 is equal to 1 plus log x - 1 at the base of to

Posted by Gayatri Singh 7 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

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Cos 20 degree into cos 40 degree into cos 6th degree into cos 80 degree

Posted by Benjamin Gogoi 7 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

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Cos 12th degree into cos 40 degree into cos 6th degree into cos 80 degree

Posted by Benjamin Gogoi 7 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

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Hey friends i am in problem can you slove it i was study 6 to 10 in hindi medium now i take pcmb in class 11 can i study better in it.one problem also i want take pcmc but computer science is not in school and i want study it so can i study it after 12th class

Posted by Neeraj Kumar 7 years, 5 months ago

CBSE > Class 11 > Mathematics

2 answers

Khushi Singh 7 years, 5 months ago

Liyer you are talking in good english and saying that you have a problem

Anurag Parashar 7 years, 5 months ago

If you want to bcome an IT engineer then no prblm take CS in college But kahi aur s c++ ki language ka course kr lena that would help u

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What is set-builder form

Posted by Rakshak King 7 years, 5 months ago

CBSE > Class 11 > Mathematics

1 answers

Neeraj Kumar 7 years, 5 months ago

A Set is a collection of things (usually numbers). Example: {5, 7, 11} is a set. But we can also "build" a set by describing what is in it. Here is a simple example of set-builder notation: It says "the set of all x's, such that x is greater than 0".

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The number of solutions of the equation Sin3alpha = 4sinalpha× sin(x+alpha)×sin(x-alpha) where 0<alpha<180 for x in the interval [0,180] is?

Posted by Lekkala Seshasai 7 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

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(1+i)(1+√3i)/1-i from complex numbers solution

Posted by Prahlad Sharma 7 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

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Tan x=-4/3x in quadrant 2

Posted by Gowtham Kowshik 7 years, 5 months ago

CBSE > Class 11 > Mathematics

1 answers

Nancy Rajput 7 years, 5 months ago

we find all 6 trignometric

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| x2-x-6 | =x+2

Posted by Kartavya Verma 7 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

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sin(B-C)/sin(B+C)=b*b-c*c/a*a

Posted by Gautam Yadav 7 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

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cos36°.cos72°.cos108°.cos144°

Posted by Dinesh Thapa 7 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

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2a+9d=-30 and 2a+19d=-69

Posted by Rachit Khandelwal 7 years, 5 months ago

CBSE > Class 11 > Mathematics

1 answers

Rachit Khandelwal 7 years, 5 months ago

Plz answer fast

5Thank You

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Two equivalent sets are always equal. Is it true or false and give reason if it is true.

Posted by Priya Thakur 7 years, 5 months ago

CBSE > Class 11 > Mathematics

1 answers

Prabhat Emmanuel 7 years, 5 months ago

False because in equivalent set elements are not necessarily same.