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Show that the relation is R in the set R of real numbers, defined as R={(a, b):a<=b2 } is neither reflexive nor symmetric nor transitive.

Posted by Harshitha D 4 years, 2 months ago

CBSE > Class 12 > Mathematics

1 answers

Siddhant Singh 4 years, 2 months ago

How the solution of this question can be posted in image formate

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Kya Ex 1.4 remove h

Posted by Tanushree Kumawat 4 years, 2 months ago

CBSE > Class 12 > Mathematics

1 answers

Anurag Chaudhary 4 years, 2 months ago

Ha 1.4 or 6.4 bhi

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A={1,2,3,4} given by R={(a,b):a-b=10}

Posted by Simran Prajapati 4 years, 2 months ago

CBSE > Class 12 > Mathematics

1 answers

Preeti Dabral 4 years, 2 months ago

TO DETERMINE

CALCULATION

It is given that

Now a relation from A to A is a subset of A × A

Where A × A is the Cartesian product of A and A

We we have to determine a Relation R with the below mentioned property

Now there does not exist any ( a, b) in A × A such that a - b = 10

So the Required Relation is Empty

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Let f: ? → ? be a function given by f(x)=ax+b for all x in R . Find the constants a and b such that fof = IR

Posted by M Vishnu Sreedharan 4 years, 2 months ago

CBSE > Class 12 > Mathematics

0 answers

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Solve lim x approaches zero (sin4x-tan4x)/x^3

Posted by Sher Singh 4 years, 2 months ago

CBSE > Class 12 > Mathematics

0 answers

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Under what conditions a function f:A→B is one-one, if n(A)=m and n(B)=n .

Posted by Arnab H. 4 years, 2 months ago

CBSE > Class 12 > Mathematics

0 answers

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Objective function of a LPP is (a)a constant (b)a function to be maximized or minimized under given constraints. (c)a relation between the variables (d)none of these .

Posted by Arnab H. 4 years, 2 months ago

CBSE > Class 12 > Mathematics

0 answers

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What is the domain of the function sin^ -1 (1-x)

Posted by Arnab H. 4 years, 2 months ago

CBSE > Class 12 > Mathematics

0 answers

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AB is a straight road leading to C , the foot of a tower . A is at distance 200m. from C and B at 75m. from C. If the angle of elevation of the tower at B be double the angle of elevation at A, then the hight of the tower is :

Posted by Sahil Kumar 4 years, 2 months ago

CBSE > Class 12 > Mathematics

0 answers

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if A and B are matrices of same order, then ( 3A - 2B) is equal to

Posted by Bhami Anand 4 years, 3 months ago

CBSE > Class 12 > Mathematics

1 answers

Astha Gupta 4 years, 3 months ago

3(A) - 2(B)

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$$\displaystyle\int\limits^{tanx}_{1/e} \frac{tdt}{1+t^2}$$

Posted by ?⚡Her?️⚡? 4 years, 3 months ago

CBSE > Class 12 > Mathematics

1 answers

? Royal Thakur ? 4 years, 2 months ago

Hii

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Prove that cos-112/13 + sin-1 3/5 = sin-1 56/65

Posted by Shreyas Singh 4 years, 3 months ago

CBSE > Class 12 > Mathematics

1 answers

Preeti Dabral 4 years, 3 months ago

Let {tex}{\cos ^{ - 1}}\frac{{12}}{{13}} = \theta{/tex} so that {tex}\cos \theta = \frac{{12}}{{13}}{/tex}
{tex}\therefore \sin \theta = \sqrt {1 - {{\cos }^2}\theta } = \sqrt {1 - \frac{{144}}{{169}}}{/tex}{tex}= \sqrt {\frac{{25}}{{169}}} = \frac{5}{{13}}{/tex}
Again, Let {tex}{\sin ^{ - 1}}\frac{3}{5} = \phi{/tex} so that {tex}\sin \phi = \frac{3}{5}{/tex}
{tex}\therefore \cos \phi = \sqrt {1 - {{\sin }^2}\phi } = \sqrt {1 - \frac{9}{{25}}} = \sqrt {\frac{{16}}{{25}}} = \frac{4}{5}{/tex}
Since {tex}\sin \left( {\theta + \phi } \right) = \sin \theta \cos \phi + \cos \theta \sin \phi {/tex} {tex} = \frac{5}{{13}} \times \frac{4}{5} + \frac{{12}}{{13}} \times \frac{3}{5}{/tex}
{tex}= \frac{{20 + 36}}{{65}} = \frac{{56}}{{65}}{/tex}
{tex}\Rightarrow \theta + \phi = {\sin ^{ - 1}}\frac{{56}}{{65}}{/tex}
{tex} \Rightarrow {\cos ^{ - 1}}\frac{{12}}{{13}} + {\sin ^{ - 1}}\frac{3}{5} = {\sin ^{ - 1}}\frac{{56}}{{65}}{/tex}

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There are two families A and B. There are 4 men, 6 women and 2 men in family A whereas 2 men, 2 women and 4 children in family B. The recommended daily requirement for calories is Man: 2400, woman: 1900, child: 1800 and for proteins is Man: 55 gm, woman: 45 gm, child: 33 gm. In order to find the total requirement of calories and prot eins for each of the two families if we represent number of members in two families by matrix P and requirement of calories and proteins by matrix Q and do the product PQ= R (where R is the resultant matrix obtained by the product). Then answer the following: The order of the matrix P should be

Posted by Shreyas Singh 4 years, 3 months ago

CBSE > Class 12 > Mathematics

5 answers

Tushar Hooda 4 years, 3 months ago

I hope u will find it helpful

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Tushar Hooda 4 years, 3 months ago

Order of matrix p be 2×3

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Tushar Hooda 4 years, 3 months ago

Number of family members X=[ 4 2 6 2 2 4 ] Daily amount of calories Y= ⎣ ⎢ ⎢ ⎡ 2400 1900 1800 ⎦ ⎥ ⎥ ⎤ Daily amount of proteins Z= ⎣ ⎢ ⎢ ⎡ 45 55 33 ⎦ ⎥ ⎥ ⎤ Total requirement of calories: XY=[ 4 2 6 2 2 4 ] ⎣ ⎢ ⎢ ⎡ 2400 1900 1800 ⎦ ⎥ ⎥ ⎤ =[ 24600 15800 ] Total requirement of proteins XZ=[ 4 2 6 2 2 4 ] ⎣ ⎢ ⎢ ⎡ 45 55 33 ⎦ ⎥ ⎥ ⎤ =[ 576 332 ]

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Tushar Hooda 4 years, 3 months ago

If it is 2 children then answer is :

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Tushar Hooda 4 years, 3 months ago

In 2nd line is it 2 men or children

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Derivative of e^sin(cosx)

Posted by Anoopa Elizabeth Sebastian 4 years, 3 months ago

CBSE > Class 12 > Mathematics

2 answers

Tushar Hooda 4 years, 3 months ago

d(e^sin(cosx) / dx = =e^sin(cosx). Cos(cosx). -sinx =-e^sin(cosx).cos(cosx). Sinx

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Tushar Hooda 4 years, 3 months ago

d(e^sin(cosx) / dx = e^sin(cosx). Cos(cosx). -sinx -e^sin(cosx).cos(cosx). Sinx

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Find principal value of tan-1(sin(π/2))

Posted by Abhijith S A 4 years, 3 months ago

CBSE > Class 12 > Mathematics

1 answers

Tushar Hooda 4 years, 3 months ago

tan-¹(sin(π/2) = tan-¹(1) = tan-¹(tanπ/4) = π/4 Thus, π/4 is required principal value as it lies b/w (-π/2 , π/2)

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cos(2π-π/3)

Posted by Sk Sk 4 years, 3 months ago

CBSE > Class 12 > Mathematics

1 answers

Tushar Hooda 4 years, 3 months ago

Cos(2π-π/3) = cos π/3 [ Cos(2π-x) = cosx ] Cosπ/3 = 1/2 Hence solved!!!

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|x|=y x=+-y True or false

Posted by Abhishek Gupta 4 years, 3 months ago

CBSE > Class 12 > Mathematics

1 answers

Ayush Kumar 4 years, 2 months ago

True

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Find the Equation of tangent to the curve given by x = asin3 & y= bcos3t at a point where t=π/2

Posted by Aditya Soni 4 years, 3 months ago

CBSE > Class 12 > Mathematics

1 answers

Badal Barasiya 4 years, 2 months ago

x=asin 3 t dx=a3sin 2 t(cost)dt…(1) y=bcos 3 t dy=b3cos 2 t(−sint)dt ..(2) At t= 2 Π dt dx =0 and hence dx dy =not defined

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Hlo guys...kya koi app h jisme element math ka option ho..plz tell me...?

Posted by ᵐꜞᔆᔆ᭄ Qᴜᴇᴇɴ✿࿐꧂ : ꨄ︎•, 4 years, 3 months ago

CBSE > Class 12 > Mathematics

1 answers

ᵐꜞᔆᔆ᭄ Qᴜᴇᴇɴ✿࿐꧂ : ꨄ︎•, 4 years, 2 months ago

Ghh

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By elementary transformation find inverse if matrix | 2 -3 3 | | 1 5 9 | | 6 4 7 |

Posted by Anjali Rai 4 years, 3 months ago

CBSE > Class 12 > Mathematics

2 answers

Satyam Satyam 4 years, 2 months ago

Do you use any social media handle maybe I'll help you there

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Satyam Satyam 4 years, 2 months ago

I have done it but I don't know to send it to you

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Ok but I modified the question a bit . Maybe the power of tan^-1x is only sin^-1x , if all those were powers why were they not in bracket? Besides, the power 4x would not be seperate as power on power is multiply. Sp I did according to it. Is it ok #shruti singh? But my answer is coming b instead of c

Posted by ?⚡Her?️⚡? 4 years, 3 months ago

CBSE > Class 12 > Mathematics

5 answers

?⚡Her?️⚡? 4 years, 3 months ago

I am done till dy/dx = ylogy/x now i am confused

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?⚡Her?️⚡? 4 years, 3 months ago

I did it roughly now I am own confused

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Shashwat Singh 4 years, 3 months ago

Nhi... Answer option (c) correct h.. But aap solution to bhejo...

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?⚡Her?️⚡? 4 years, 3 months ago

Ok.. answer is 0 ..??

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Shashwat Singh 4 years, 3 months ago

Ohk... bhej do solution ?

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Equivelence Relations definition

Posted by Sandeep Ranjan Bisoi 4 years, 3 months ago

CBSE > Class 12 > Mathematics

3 answers

Sher Singh 4 years, 2 months ago

The relation which is reflexive, symmetric and transitive is said to be equivalence relation . For ex- parallel relation as if a is parallel to b and b is parallel to c then it will be an equivalence relation

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Shubham Roy 4 years, 3 months ago

Parallel lines: a parallel to b, b parallel to c

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Parthib Ghosh 4 years, 3 months ago

A Relation which is reflexive, symmetric and transitive.

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Class 12 maths activity 12 observations

Posted by Pratham Verma 4 years, 3 months ago

CBSE > Class 12 > Mathematics