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answr Join / Login What would you like to ask? 11thMathsComplex Numbers and Quadratic EquationsQuadratic EquationsIf the roots of the equatio... Maths If the roots of the equations ax2+2bx+c=0 and bx2−2acx+b=0 are simultaneously real, then prove that b2=ac. Easy Answer Let D1 and D2 be the discriminants of the two equations, then D1≥0 and D2≥0 ⇒4b2−4ac≥0 and 4ac−4b2≥0 ⇒b2≥ac and ac≥b2 ⇒b2=ac

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If 2sin^2theta-cos^2theta=2,then find the value if theta.

Posted by Himanshu Verma 4 years, 10 months ago (10208562)

CBSE > Class 10 > Mathematics

2 answers

Sunny Singh 4 years, 10 months ago (5130061)

Thita = 90°

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Gade Sarvesh 4 years, 10 months ago (9467015)

2sin^2theta-cos^2theta=2 Theta=90°.

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Hindi mcq

Posted by Anant Dev Mishra 4 years, 10 months ago (10679007)

CBSE > Class 05 > English

0 answers

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The points A(4,7),B(p,3)and C(7,3)are the vertics of a right triangle, right angle at B.Find the value of p.

Posted by Himanshu Verma 4 years, 10 months ago (10208562)

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Why Narendra modi said no first use can be reviewed

Posted by Xii-E Archita Bhadana 4 years, 10 months ago (10835975)

CBSE > Class 12 > Political Science

1 answers

Harsh Chaudhary 4 years, 10 months ago (10170617)

Narendra modi said no first use can be reviewed because india is in between all enemy countries and china is very developed/developing country and china have top rated nuclear weapons so, narendra modi said that no 1st use can be reviwed.

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What do you mean by cooperative federalism

Posted by Xii-E Archita Bhadana 4 years, 9 months ago (10835975)

CBSE > Class 12 > Political Science

1 answers

Sia ? 4 years, 9 months ago (6945213)

Federalism is a system of government in which states or provinces share power with a national government. Cooperative federalism refers to a concept where various states cooperate with each other and with the centre to achieve the goals of growth, development of the states and the nation.

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If the perimeter of semicircular protractor is 36cm,find its diameter.

Posted by Himanshu Verma 4 years, 10 months ago (10208562)

CBSE > Class 10 > Mathematics

3 answers

Life Is Full Of Struggle 4 years, 10 months ago (4224005)

11.45 is wrong answer ?

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Life Is Full Of Struggle 4 years, 10 months ago (4224005)

2r+πr=36......... r(2+π)=36......... r{2+22/7}=36........ r(36/7) =36 ...... r=7 ...... Diameter = 2(7) =14cm

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Kinjal Agarwal 4 years, 10 months ago (10783641)

11.45

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What is the meaning of bottom approach

Posted by Xii-E Archita Bhadana 4 years, 9 months ago (10835975)

CBSE > Class 12 > Political Science

1 answers

Sia ? 4 years, 9 months ago (6945213)

A bottom-up approach is the piecing together of systems to give rise to more complex systems, thus making the original systems sub-systems of the emergent system. Bottom-up processing is a type of information processing based on incoming data from the environment to form a perception.

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Taking theta=30°,verify cos3theta=4cos(cube)theta-3cos theta

Posted by Himanshu Verma 4 years, 10 months ago (10208562)

CBSE > Class 10 > Mathematics

0 answers

ANSWER

If two tangents incline at an angle of 60°are drawn to a circle of radius 3 cm,find the length of each tangent?

Posted by Himanshu Verma 4 years, 10 months ago (10208562)

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Write the name of some important mountain range of the world

Posted by Avinash Raj 4 years, 10 months ago (10604043)

CBSE > Class 08 > Social Science

2 answers

Sai Sabnam 4 years, 10 months ago (10852260)

The name of some important mountain range of the world 1. Andes ( South America ) 2. Alaska Range ( North America )

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Kanishka Kava 4 years, 10 months ago (9184149)

Alps

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Name the subdivision of the eastern coastal plain

Posted by Umang Kumar 4 years, 10 months ago (10016361)

CBSE > Class 09 > Social Science

3 answers

Sushant Sharma 4 years, 10 months ago (10569225)

THE EASTERN COASTAL PLAIN is divided into two parts : (1) The Northern part- NORTHERN CIRCARS (2) The Southern part- COROMANDEL COAST

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Rishabh Kothari 4 years, 10 months ago (8963355)

Eastern coastal plain is divided into two parts * The northern part is known as NORTHERN CIRCARS. * The southern part is known as COROMANDEL COAST.

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Vaibhav Kumar Deo ×͜× 4 years, 10 months ago (4336662)

Eastern costal plains is divided into 2 stretches north and south. The part which is known as coromandel coast

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Pineapple products par project kyese bnaye

Posted by Anamika Verma 4 years, 10 months ago (10405290)

CBSE > Class 12 > व्यवसाय अध्ययन

0 answers

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mere chart par bet ha kabootar

Posted by Shivani Rajput 4 years, 10 months ago (10842918)

CBSE > Class 12 > हिंदी ऐच्छिक

0 answers

ANSWER

What is preamble?

Posted by Himanshi Khatri 4 years, 10 months ago (9409881)

CBSE > Class 11 > Political Science

2 answers

Swarna Chaudhary 4 years, 10 months ago (10268195)

A preamble is an introduction to constitution .It is also known as the blue print of constitution ,because preamble contains the basic idea of constitution.

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Kunal Sharma 4 years, 10 months ago (9665203)

A preamble is an introduction to a document that describes the documents purpose. The word comes from "pre" meaning "before" and "amble" meaning walk. A preamble can contain facts about the document. ... A data packet has a preamble which the system needs but which goes before the data that the user will use.

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Describe the cases of the russian revolution 1917

Posted by Sher Singh Sisodiya 4 years, 10 months ago (10737484)

CBSE > Class 09 > Social Science

2 answers

Tanisha Bhagel 4 years, 10 months ago (10441876)

Because of inequality

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Vaibhav Kumar Deo ×͜× 4 years, 10 months ago (4336662)

Social inequality Subsistences crises Economic problems Strong middle class Immediate causes

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Define ddl and dml

Posted by Gautam Kumar 4 years, 10 months ago (10746608)

CBSE > Class 10 > Information Technology (402)

2 answers

Krisha Tripathi 4 years, 10 months ago (7473067)

DDL is stand for data definition language DDL command are create ,alter, drop. DML is stand for data manipulation language DML commands are select ,insert, delete ,update.

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Dhanasree .R 4 years, 10 months ago (7338286)

DDL stands for Data Definition Language. DML stands for Data Manipulation Language. DDL statements are used to ceate database, schema, constraints, users, tables etc. DML statement is used to insert, update or delete the records.

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What is the least number that is divisible by all the number from 1 to 10 and why?

Posted by Himanshu Verma 4 years, 10 months ago (10208562)

CBSE > Class 10 > Mathematics

1 answers

Bhoomika Verma 4 years, 10 months ago (9985395)

The least number divisible by all the numbers from 1 to 10 will be the LCM of these numbers.....1=1 .......2=2×1 .....3=3×1......4=2×2......5=5×1.. ...6=2×3......7=7×1.......8=2×2×2........9=3×3.....10=2×5...........so,LCM of these numbers=1×2×2×2×3×3×5×7=2520........hence,least number divisible by all the numbers from 1 to 10 is 2520.

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Complete the following reactions: (i)CO(g) + 2H2 ⎯⎯Δ→CH3OH (ii)C3H8 (g) +3H2O ⎯⎯Δ→3CO + 7H2 (iii)Zn(s) + 2NaOH(aq) ⎯⎯Δ→Na2ZnO2 + H2 What is water-gas shift reaction? Give its chemical equation

Posted by Chesta Gupta 4 years, 10 months ago (7059477)

CBSE > Class 11 > Chemistry

1 answers

Mamali Mishra 4 years, 10 months ago (9300837)

CO + 2H2O = CO2 + 2H2, this is water gas shift reaction

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How can the production of dihydrogen, obtained from ‘coal gasification’, be increased?

Posted by Chesta Gupta 4 years, 10 months ago (7059477)

CBSE > Class 11 > Chemistry

0 answers

ANSWER

A sample of pure PCl5 was introduced into an evacuated vessel at 473 K. After equilibrium was reached, the concentration of PCl5 was found to be 0.5 x 10-1 mol L-1. If Kc is 8.3 x 10-3 what are the concentrations of PCl3 and Cl2 at equilibrium?

Posted by Chesta Gupta 4 years, 10 months ago (7059477)

CBSE > Class 11 > Chemistry

0 answers

ANSWER

How do you expect the metallic hydrides to be useful for hydrogen storage? Explain

Posted by Chesta Gupta 4 years, 10 months ago (7059477)

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Define Markovnikovs rule with suitable example.Also write the mechanism of reaction.

Posted by Chesta Gupta 4 years, 10 months ago (7059477)

CBSE > Class 11 > Chemistry

3 answers

Anay Studies 4 years, 10 months ago (10952364)

Its simple A reaction with unsymmetrical alkene when attacked by H+X-, The X- attacks the + atom of the alkene as CH3-CH=CH2 on reacting with HCl gives CH3-CH-Cl-CH3

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Payal Jangir 4 years, 10 months ago (10864626)

I hope it helps you

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Payal Jangir 4 years, 10 months ago (10864626)

Markovnikovs rule: According to this rule, -ve part of attendum gives to that double bonded c-atom which contain least no. of H-atom. Rxn intermediate- Carbonation

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