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

It dosnt matter miss palak ojha . This type of questions will come or not in examination.. Knowledge khi se bhi le li jaati h or aesa to ni h ki hmari zindagi sirf board tkk h aage bhi.. H na...

2Thank You

Diksha? 6 years, 2 months ago

Sin(90+thita)=cos thita

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Abhinav ? 6 years, 2 months ago

???

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Palak Ojha 6 years, 2 months ago

Hello this type of questions will mot come in exam

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Dr. Sanskari ?‍⚕️?‍⚕️ 6 years, 2 months ago

Sin120=sin60+60......we can also write sinA+B=sinA.cosB + cosA.sinB........so......sin60+cos60...+ cos 60+sin60..........root 3/2×1/2....+...root. 1/2×3/2....equals to.....2×root 3/4......=root 3/2...???

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Aadya Singh ? 6 years, 2 months ago

Kisi ko nhi aa rha..??? Jane do ??????

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Aadya Singh ? 6 years, 2 months ago

Kiya maine...nhi samagh aaya ????

3Thank You

R G R 6 years, 2 months ago

Search in Google ???

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Aadya Singh ? 6 years, 2 months ago

Koi bta do..kaise aayega..??? ??????

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Diksha? 6 years, 2 months ago

Yes

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Aadya Singh ? 6 years, 2 months ago

But how is it equal to cos 30°..??? ????

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Aadya Singh ? 6 years, 2 months ago

Dr...ye batao...kaise aaya...???value meko bhi pta h????

2Thank You

R G R 6 years, 2 months ago

It is equal to cos 30 °

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Dr. Sanskari ?‍⚕️?‍⚕️ 6 years, 2 months ago

??root 3/ 2.

1Thank You

Aadya Singh ? 6 years, 2 months ago

But how..???

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R G R 6 years, 2 months ago

Root 3 by 2..... Is it correct??

2Thank You

ANSWER

The 5th & 15th terms of ap are 13 & -17 respectively find the sum of the first 21 terms of the ap

Posted by Kulwinder Matharu 6 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Deepanshu Tyagi 6 years, 2 months ago

Given, A+4d=13 ___(1) and a+14d=-17___(2) Subtracting (1) from (2):- A+14d=-17 A+4d=13 - - - __________ 10d=-30 __________ D=-3 Putting this value in eq.(1):- A+4d=13 A+4*(-3)=13 A-12=13 A=25 Sn=n/2 [2a+(n-1)d] S²¹=21/2 [2*25 +(21-1)-3] S²¹=21/2 [50 - 60] S²¹=21/2 *(-10) S²¹=-105

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ANSWER

formula to find distance of point to centre

Posted by Raman Dhaliwal 6 years, 2 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Base proportional theorem

Posted by Anmol Sharma 6 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Diksha? 6 years, 2 months ago

Base or basic

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ANSWER

A polehas to be erected at a point in the boundary of a circular park of diameter 13m in such a way that the difference of it's distance from two diametrically opposite fixed Gates A and B on the boundary is 7M. Is it possible to do so? If yes, at what distance from the two Gates should the be erected?

Posted by Rekha Nayak 6 years, 2 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

2+2=??????

Posted by Sëlfìê ?? 6 years, 2 months ago

CBSE > Class 10 > Mathematics

35 answers

Riya Rathore 6 years, 2 months ago

0Thank You

Sëlfìê ?? 6 years, 2 months ago

Lekin agr itnaaaaa hard ques.. Aaya boards to main kya krungi???????

1Thank You

Sëlfìê ?? 6 years, 2 months ago

Hmm shayad 4 hi hogaa

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📕Queen 📕Queen 6 years, 2 months ago

Ha ha syd 4 hi aaye ga

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Dr. Sanskari ?‍⚕️?‍⚕️ 6 years, 2 months ago

?????????????shayad ans 4 hi hona chiye...????????

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Aadya Singh ? 6 years, 2 months ago

hii??

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Diksha? 6 years, 2 months ago

Gyi kya

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Diksha? 6 years, 2 months ago

1Thank You

Diksha? 6 years, 2 months ago

Hlw??

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Aadya Singh ? 6 years, 2 months ago

Hlo diku...I'm back ???????

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Sëlfìê ?? 6 years, 2 months ago

Hehe.. Dnt.. Wrry ankesh hmari research zarri h

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Ankesh ..... 6 years, 2 months ago

Pata ni?????

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Sëlfìê ?? 6 years, 2 months ago

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Diksha? 6 years, 2 months ago

???

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Sëlfìê ?? 6 years, 2 months ago

Pta ni kitna hard ques.. Puch lete h log hm board ke bacho se ufff???

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Diksha? 6 years, 2 months ago

Okay baad m ana?

1Thank You

Sëlfìê ?? 6 years, 2 months ago

???

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Sëlfìê ?? 6 years, 2 months ago

H mere khyal se 4 hogaa

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Diksha? 6 years, 2 months ago

Haa 1 min late ??

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Diksha? 6 years, 2 months ago

Rat ko kitne baje soyi kal?

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Aadya Singh ? 6 years, 2 months ago

Bye...thodi der baad aaungi ???

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Diksha? 6 years, 2 months ago

????

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Aadya Singh ? 6 years, 2 months ago

Mai ek min late ho gyi ????

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Aadya Singh ? 6 years, 2 months ago

Good afternoon ?????

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Aadya Singh ? 6 years, 2 months ago

Oh...mai bhi sure nhi hu...ab tmko lag rha hoga...tbb sahi hoga..????ab zainab answer likh sakti h ????

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Diksha? 6 years, 2 months ago

G M

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Aadya Singh ? 6 years, 2 months ago

Hlw diku ??????

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Diksha? 6 years, 2 months ago

Meko bhi lg rha h 4 hga, bt sure ni hu???

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Diksha? 6 years, 2 months ago

Hlw aadu??

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Aadya Singh ? 6 years, 2 months ago

????

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Diksha? 6 years, 2 months ago

Ksi ho

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Diksha? 6 years, 2 months ago

Zainab?

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Aadya Singh ? 6 years, 2 months ago

?????may be the answer is 4 ..???

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Diksha? 6 years, 2 months ago

Ki pata yaar???

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Aadya Singh ? 6 years, 2 months ago

From where u get this question...?? It's too hard ?...but don't worry...I will try to solve it ????

2Thank You

ANSWER

If 4 balls

Posted by Reetesh Mishra 6 years, 2 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

why voltmeter connect in parallel

Posted by Ujjwal Kumar Seth 6 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Abhinav ? 6 years, 2 months ago

If voltmeter is connected in series, it will change the value of potential difference by minimising the current in the circuit, it has very large resistance anf will give faulty reading. So to prevent these, a voltmeter is connected in parallel.

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ANSWER

Basin was sailing the balloons in a street . Aadi wants to sail a big balloon . He saw that a round balloon of radius 1cm subtend s an angle 60 at his eyes while the angle of elevation of its centre is 30 . Find the height of the centre of the balloons

Posted by Priyanshu Kaushik 6 years, 2 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

In the given figur in triangel abc de ll bc . If ad 6cm db 5 and ae 7.2 cm then find ec

Posted by Amit Pandey 9811 6 years, 2 months ago

CBSE > Class 10 > Mathematics

2 answers

Aniket Anand 6 years, 2 months ago

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Ritika Rajput 6 years, 2 months ago

AD/DB=AE/EC 6/5=7.2/EC EC=7.2×5/6 =6

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ANSWER

What is relation between mean ;median ;mode

Posted by Kaushiki Singh 6 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Harshit Chaudhary 6 years, 2 months ago

3median=mode+2mean

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ANSWER

Prove that sin 30 is 1/2

Posted by Kaushiki Singh 6 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Yash Garg 6 years, 2 months ago

Draw a equlateral triangle with side 2a . Now draw its median which is angle bisector also . It divides side of triangle in two equal parts each of a. now upple angle is 30 median subtend right angle and third angle is 60 . Use formula for sin =p/h

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ANSWER

A bucket made of aluminium sheet is of height 20 cm and its upper and lower ends are of radius 25 cm and 10 cm respectively. Find the cost of making the bucket if the aluminium sheet cost 70rs pet 100cm square

Posted by Rohan Kumar 6 years, 2 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Can we apply any mean method to question cbse does not ask

Posted by Technical Raj 6 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Miss. 1234 6 years, 2 months ago

yeah we can use any of the three mean methods....but sometimes for easy calculations we use assumed mean method?

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ANSWER

Find the value of k so that the area of the triangle with vertices (1,-1) , (-4,2k) and (-k,-5) is 24 sq. Units

Posted by Lambardar Bishnoi 6 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Khushi Rathore 6 years, 2 months ago

Value of K is 3 and - 9/2 but we never take negative value so we take 3

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ANSWER

Marking scheme of all the chapters for standard math

Posted by D Pal 6 years, 2 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

ab is diameter of circle with center o. xy is tangent to the circle at point p. am and bn are drawn parallel on xy from a and b respectively. if ab= 15 cm , ap=9 cm. then find am/bn

Posted by Tanmay Yadav 6 years, 2 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

if 3x, 3x+10, 3x+2 are in ap then the value of x is

Posted by Ayushi Khare 6 years, 2 months ago

CBSE > Class 10 > Mathematics

2 answers

Ashwani Yadav 6 years, 2 months ago

All real

2Thank You

Aman Narwal 6 years, 2 months ago

Not defined

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ANSWER

What is numer system

Posted by Utsav Sinha 6 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Zaheen Mohammed 6 years, 2 months ago

a system in which there is numbers?

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ANSWER

5 x square - 136 X + 384 equal to zero

Posted by Om Lohar 6 years, 2 months ago

CBSE > Class 10 > Mathematics

2 answers

Aman Narwal 6 years, 2 months ago

X=24 or 3.2

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Aadya Singh ? 6 years, 2 months ago

x = 16/5 or 24..

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ANSWER

prove 2 is irrational

Posted by Yogsaa Rathore 6 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 6 years, 2 months ago

Let us assume √2 is rational number.
a rational number can be written into he form of p/q
√2=p/q
p=√2q
Squaring on both sides
p²=2q²__________(1)
.·.2 divides p² then 2 also divides p
.·.p is an even number
Let p=2a (definition of even number,'a' is positive integer)
Put p=2a in eq (1)
p²=2q²
(2a)²=2q²
4a²=2q²
q²=2a²
.·.2 divides q² then 2 also divides q
Both p and q have 2 as common factor.
But this contradicts the fact that p and q are co primes or integers.
Our supposition is false
.·.√2 is an irrational number.