CBSE > Class 10 > Mathematics | CBSE Board | Homework Help

Any positive integer can be written in form a=bq+r, if we assume b = 2, then r can take values greater than or equal to 0 and less than 2. Than means a = 2q+0, a= 2q+1, but a=2q is multiple of 2 , hence it is even number, and a = 2q+1 is not multiple of 2 hence it is odd number..

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Let cosA+sinA = root2cosA.show that cosA-sinA=root2 sinA

Posted by Himanshu Dagar 7 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Chandrashekhar Wankhede 7 years, 9 months ago

Sqr(cos A+sinA)=sqr( /2 *cosA) Sqr(cosA)+2sinAcosA+sqr(sinA)=2*sqr(cosA) 2 sinA cosA = 2*sqr(cosA) -1 Now, sqr(cosA - sinA) = sqr(cosA) - 2sin A cos A + sqr(sinA) .... = 1 - ( 2 Sqr (cos A ) - 1) .... = 2 - 2 Sqr (cos A) .... = 2 ( 1- Sqr (cos A) ) .... = 2 Sqr (sin A) Taking Sqr root on both side, we can prove desired..

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Maths Real numbers

Posted by Aakash Jeffry 7 years, 9 months ago

CBSE > Class 10 > Mathematics

0 answers

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What is the probability of getting a Friday in a leap year????

Posted by Sahil Kumar 7 years, 9 months ago

CBSE > Class 10 > Mathematics

5 answers

Tejas Dagdiya 7 years, 9 months ago

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Khushali Sharma 7 years, 9 months ago

2/7

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Aisha Singh 7 years, 9 months ago

2/7

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Rahul Brar 7 years, 9 months ago

2/7

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Umakshi Sharma 7 years, 9 months ago

2/7

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A building is in the form of a right cylinder surmounted by a hemispherical vaulated dome and contain 1144/21m^3of air . If the internal diameter of dome is equal to 4/5of total height above the floor ,find height of the building

Posted by Nishu Nain 7 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Nishant Sharma 7 years, 9 months ago

Ans kya hai

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Prove that root 2 is a irrational number

Posted by Satyam Choudhary 7 years, 9 months ago

CBSE > Class 10 > Mathematics

2 answers

Anusree R Pillai 7 years, 9 months ago

Assume

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Anshu Jain 7 years, 9 months ago

Let root 2 be a rational no. Means root 2 = a/b Root2b=a Squaring both the sides we get 2b square =a square Let a=2c 2b squre = 4c square B sq.= 2 c sq B has two fqctirs

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Is ncert enough for construction s chapter??

Posted by Harleen Kaur 7 years, 9 months ago

CBSE > Class 10 > Mathematics

3 answers

Priya Dharshini ? 7 years, 9 months ago

Ya more than enough

1Thank You

Cutiepie Pravleen 7 years, 9 months ago

yup

1Thank You

Anshu Jain 7 years, 9 months ago

Yaa

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If I do practice from ncert and exam idea , Will I be able to score 75+

Posted by Harleen Kaur 7 years, 9 months ago

CBSE > Class 10 > Mathematics

5 answers

Priya Dharshini ? 7 years, 9 months ago

Ya 100%

1Thank You

Khushali Sharma 7 years, 9 months ago

Ya ya

1Thank You

Cutiepie Pravleen 7 years, 9 months ago

yes

1Thank You

Anshu Jain 7 years, 9 months ago

Yes ncert is The best

1Thank You

Rahul Brar 7 years, 9 months ago

Not sure

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A car has two

Posted by Bhavnish Attri 7 years, 9 months ago

CBSE > Class 10 > Mathematics

2 answers

Khushali Sharma 7 years, 9 months ago

Mirrors

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Bharti Verma 7 years, 9 months ago

headlight

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How to change cm in m

Posted by Aryan Dhiman 7 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Anusree R Pillai 7 years, 9 months ago

Divide the given number by 100 .....................simple...................

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Shape of a cube

Posted by Joy Das 7 years, 9 months ago

CBSE > Class 10 > Mathematics

0 answers

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How to find hcf

Posted by Manu Raj 7 years, 9 months ago

CBSE > Class 10 > Mathematics

3 answers

Priya Dharshini ? 7 years, 9 months ago

Simple long division or prime factorization

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Bharti Verma 7 years, 9 months ago

a=bq+r

2Thank You

Khushbu . 7 years, 9 months ago

By Eucil division lemma.

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Shape of cube

Posted by Joy Das 7 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Khushbu . 7 years, 9 months ago

cube is a shape

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From an external point p, two tangents pa and pb are drawn to the circle with the Centre o. Prove op is the perpendicular bisector of ab

Posted by Nitin Jindal 7 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Darshanaa Yadav 7 years, 9 months ago

Theorem 10.1 se ho jyega

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Sec+

Posted by Prince Pandey 7 years, 9 months ago

CBSE > Class 10 > Mathematics

0 answers

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Bhaiyon aur behano ye ALTERNATE SEGMENT THEOREM apne syllabus me hai kya?????

Posted by Abc Def 7 years, 9 months ago

CBSE > Class 10 > Mathematics

6 answers

Avni Neil Khanna 7 years, 9 months ago

Yes hai

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Khushali Sharma 7 years, 9 months ago

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Priya Dharshini ? 7 years, 9 months ago

It is there in maths lab activity book. Don't think so it will not come

1Thank You

Darshanaa Yadav 7 years, 9 months ago

2Thank You

Harry Sood 7 years, 9 months ago

No but Thales theroum

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Megha Prajapati 7 years, 9 months ago

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Exceeds me addition hota hai ya subtraction

Posted by Laksh Chauhan 7 years, 9 months ago

CBSE > Class 10 > Mathematics

7 answers

Laksh Chauhan 7 years, 9 months ago

Please give correct answer

0Thank You

Priya Dharshini ? 7 years, 9 months ago

Addition

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Megha Prajapati 7 years, 9 months ago

Subtract hota h yaarr

2Thank You

Dhanashri Kadam 7 years, 9 months ago

Add+

2Thank You

Nidhi Ghosh 7 years, 9 months ago

Subtracted

1Thank You

Megha Prajapati 7 years, 9 months ago

Subtract

1Thank You

Darshanaa Yadav 7 years, 9 months ago

Add

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Exceeds me + hota hai na -

Posted by Laksh Chauhan 7 years, 9 months ago

CBSE > Class 10 > Mathematics

2 answers

Samradh Koolwal 7 years, 9 months ago

- hota hai

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Dhanashri Kadam 7 years, 9 months ago

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In height and distance how can we know to use sin or cos??

Posted by Nikita Kumari 7 years, 9 months ago

CBSE > Class 10 > Mathematics

2 answers

Sanjana Yadav 7 years, 9 months ago

Nikita me tumse pucch rhi hu

2Thank You

Sanjana Yadav 7 years, 9 months ago

Ankit ne jo likha vo such h kya

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show that any positive odd integers is of the form 6q+1,or 6q+3,or 6q+5 where q is some integer.

Posted by Roshni B 7 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Chandrashekhar Wankhede 7 years, 9 months ago

Any positive integer can be written in form a=bq+r, if we assume b=6 then r is greater than or equal to 0 and less than 6. Then a can be written in form a=6q+0, a=6q+1, a=6q+2, a=6q+3, a=6q+4, a=6q+5. Out of these a=6q, a=6q+2 and a=6q+4 can be written as multiple of 2, hence these forms represents even numbers.. Naturally other forms, which can not be written as multiple of 2 are representing odd numbers..

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Using the formula sin(A-B) = sinA cosB - cosA sinB, find the value of sin15.

Posted by Ayush Baheti 7 years, 9 months ago

CBSE > Class 10 > Mathematics