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

Ds/dt =2cm/s. And s =20 cm. Now . A =ROOT3/4 PIE s^2 So dA/at = root 3/4 pie 2 s ds/dt. Put value of s and ds/dt in above we will get 20pie root3 its answer

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A bag A contains 4 black and 6 red balls and bag B contains 7 black and 3 red balls.A die is thrown. If 1 or 2 appears on it, then bag A is chosen, otherwise bag B, if two balls are drawn at random (without replacement) from the selected bag,find the probability of one of them being red and another black.

Posted by Ayushi Chhabra 6 years ago

CBSE > Class 12 > Mathematics

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An unbiased coin is tossed 4 times.find the mean and variance of the no. Of heads obtained.

Posted by Ayushi Chhabra 6 years ago

CBSE > Class 12 > Mathematics

0 answers

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What is continuous function

Posted by Atharv H Bhardwaj 6 years ago

CBSE > Class 12 > Mathematics

2 answers

Arun Vaishnav 6 years ago

Function whose graph be drawn without lifting the pencil

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Vaibhav Tiwari 6 years ago

The funcition whose graph is continuous throughout its domain is called continuous function.means graph does not break at any point in the given domain.

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Integration of limit 0to pi dx / 1+etothepower sinx

Posted by Kajal Nandan 6 years ago

CBSE > Class 12 > Mathematics

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Can someone please tell me..the chapters which can make me pass

Posted by Kanishka Pawar 6 years ago

CBSE > Class 12 > Mathematics

3 answers

Kanishka Pawar 5 years, 5 months ago

No can pass u

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Simranjeet Kaur 5 years, 11 months ago

3D , trignometry , probability , vector

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Mohit Swami 6 years ago

Lpp Inverse Trigo Matrix and determinants Application of integration Differential equation

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In math pleasea tell about important question which mostly come in paper

Posted by Karan Singh 6 years ago

CBSE > Class 12 > Mathematics

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Chapter 8 miscellaneous 10 question

Posted by Tiktok Masti 6 years ago

CBSE > Class 12 > Mathematics

0 answers

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245624chsgs

Posted by Jabna Landa 6 years ago

CBSE > Class 12 > Mathematics

2 answers

Lakshmi Narayan 6 years ago

Olunga oru ques keka therithaa..

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Tamanna Sharma 6 years ago

?????

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Sin^-1x +cos^-1x =π÷6

Posted by Manoj Sanghani 6 years ago

CBSE > Class 12 > Mathematics

4 answers

smit****@***** 6 years ago

Pie by 2

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Lakshmi Narayan 6 years ago

Its pi/2

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Tamanna Sharma 6 years ago

Not pie/6

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Tamanna Sharma 6 years ago

This is equal to pie/2

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Bernoulli theorem remove hone ke baad bhi isse related questions aa sakte hai kya exams me?

Posted by Srishti Jain 6 years ago

CBSE > Class 12 > Mathematics

2 answers

Meghna Sharma 6 years ago

Of course NO

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Tamanna Sharma 6 years ago

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What is matrix

Posted by Jasbirpal 12 6 years ago

CBSE > Class 12 > Mathematics

1 answers

Meghna Sharma 6 years ago

Matrix is a way to express the data in de form of a rectangular array. n in a array, horizontal lines r called rows n vertical r called columns.

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Please tell me about what percentage of paper come from NCERT

Posted by Yash Nagori 6 years ago

CBSE > Class 12 > Mathematics

2 answers

Tanshu Chaudhary 6 years ago

80 to 85 (aprox). Will be ncert and other is ncert based

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Nitin Nandal 6 years ago

It's nearly 70 to 80 percy

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Please provide me with marking scheme of mathematics 2020 paper of 12th

Posted by Rohit Patil 6 years ago

CBSE > Class 12 > Mathematics

2 answers

Mohit Swami 6 years ago

First of all it's blue print And it is available on the offcial site of cbse

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Shivam Singh 6 years ago

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Rajinder kumar ask some more ques related to maths like that of previous ones

Posted by Meghna Sharma 6 years ago

CBSE > Class 12 > Mathematics

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Compartment question papers are available on which site????

Posted by Prachi Aggarwal 6 years ago

CBSE > Class 12 > Mathematics

0 answers

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Can anyone from bhopal send their maths preboard questions

Posted by Hardik Singh 6 years ago

CBSE > Class 12 > Mathematics

0 answers

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Integration of e^-loga^x

Posted by Jangir Devesh 6 years ago

CBSE > Class 12 > Mathematics

1 answers

Jashan Aggarwal 6 years ago

e^log(x) = x So e^-log(a^x)= -a^x => integral of e^-log(a^x) is integral of -a^x Which is equal to -a^xlog(a)

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There is any change according to new syllabus 2019-20

Posted by Vipul Kumar Maurya 6 years ago

CBSE > Class 12 > Mathematics

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Integration of sinx+cosx wrt x

Posted by Abhay Dubey 6 years ago

CBSE > Class 12 > Mathematics

3 answers

Mohit Swami 6 years ago

Sinx-cosx

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Sandeep Barthwal 6 years ago

-cosx+sinx

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Sandeep Barthwal 6 years ago

IDK

2Thank You

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If sin inverse x + tan inverse x = pie by 2 prove that 2x square + 1 = root 5

Posted by Vishram Pavaskar 6 years ago

CBSE > Class 12 > Mathematics

0 answers

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The negative of a matrix is obtained by multiplying it by________

Posted by Rajinder Kumar 6 years ago

CBSE > Class 12 > Mathematics

4 answers

Meghna Sharma 6 years ago

Yeah i was guessing the same but thought that the answer cant be so simple.?

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Meghna Sharma 6 years ago

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Rajinder Kumar 6 years ago

-1 hai is ka ans

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Meghna Sharma 6 years ago

This i dont know, tell the answer.

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In LPP, the optimal value is expected at_______ points of the feasible region.

Posted by Rajinder Kumar 6 years ago

CBSE > Class 12 > Mathematics

2 answers

Meghna Sharma 6 years ago

Or u can say corner points also

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Meghna Sharma 6 years ago

Vertex

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State True or False : In a LPP the maximum value of the objective function z=ax+by is always finite

Posted by Rajinder Kumar 6 years ago

CBSE > Class 12 > Mathematics

8 answers

Tamanna Sharma 6 years ago

For more information see example 4 on page 512 NCERT

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Tamanna Sharma 6 years ago

So ,basically the answer is false

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Tamanna Sharma 6 years ago

If it is bounded then maimum value occur at corner points ,but if it is unbounded then maximum value of objective function may not exists, this is not always finite, and I know it's a exemplar question no. 45 But sometimes books answer are also wrong in the consideration of fundamental theorms. (Corner point theorm 1and 2).

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Sachin Thakur 6 years ago

???????

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Rajinder Kumar 6 years ago

True hai iska amswer

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Tamanna Sharma 6 years ago

False,its may or may not be finite

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Meghna Sharma 6 years ago

????