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a hollow cylinder of height 15 cm is melted and cast into a solid cylinder of height 3 CM if the internal and external radii of the hollow cylinder are 2 centimetre and 3 respectively then the radius of the solid cylinder is

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Saru Dahiya 6 years, 1 month ago

5cm

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ANSWER

Cos theta minus cot theta whole square equals to 1 minus cos theta by 1 + cos theta

Posted by Teena Chawla 6 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Saurabh Singh 6 years, 1 month ago

Cos theta = 1/sin theta-cos theta /sin theta whole square=1-cos theta / sin theta ka whole square 1-cos theta ka whole square / sin square theta =(1-cos theta)(1-cos theta)/(1-cos theta)(1+cos theta) = 1-cos theta /1+cos theya

2Thank You

ANSWER

Chapter 10 circles

Posted by Mayank Goyal 6 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Manminder Singh Mani 6 years, 1 month ago

Yes circles is a chapter10

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Find aquqdratic polynomial , the sum and product of whose zeroes are -3 and 5 respectively?

Posted by Rajesh Super Glass 6 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Harshita Sharma 6 years, 1 month ago

X^2 +3 +5

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Ajay ???? 6 years, 1 month ago

Xsquare+3x+5

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ANSWER

Is rsaggarwal book chapter 15 perimeter and areas of plane plane figure will come in our board exams

Posted by Shreya Keshri 6 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Ritika Verma 6 years, 1 month ago

Yes

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ANSWER

Sec^6a=tan^6a+3tan^2asec^2a+1

Posted by Sunil Nag 6 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

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The areas of two similar triangle ABC and triangle DEF are 64cm square and 121cm square respectively. If EF=15.4cm,then the value of BC will be__________?

Posted by Vansh Gupta 6 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Dharna Sharma 6 years, 1 month ago

11.2

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Ajay ???? 6 years, 1 month ago

11.2

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Solve by the completing the square method. 2x^+x-4=0

Posted by Reddappa Reddy 6 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Harshita Baweja 6 years, 1 month ago

Completing square method is not our syllabus

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ANSWER

(2x÷x-5)^2 + 2x÷x-5 - 24 = 0

Posted by Upendra Kamat 6 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Sin^A + cos^A = 1

Posted by Ravi Mehta 6 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

If p,qand r in AP then p^3+q^3 -8r^3 is equal to

Posted by Rishika Shaw 6 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Posted by Amjith Aj 6 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

♛ ❝Ѕυнαɴα❞ ♛ 6 years, 1 month ago

Dua kro ki block na ho!?

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♛ ❝Ѕυнαɴα❞ ♛ 6 years, 1 month ago

????...Dua... Dua kro!?

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If one of the zeros of p(x) = ax^2 + bx + c is 0 then find the value of c

Posted by Riddhi Vaje 6 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Dharna Sharma 6 years, 1 month ago

a(0)2+b(0)+c=0

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Bharat Patel 6 years, 1 month ago

C=0

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ANSWER

2 or 2 add

Posted by Dedha Deepu 6 years, 1 month ago

CBSE > Class 10 > Mathematics

3 answers

Yuvraj Rana 6 years, 1 month ago

2+2 = 4 and it may as 22 as a joke ,,???????????????????

1Thank You

Aadya Singh 6 years, 1 month ago

22 ????

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Shubham Yadav❤❤ 6 years, 1 month ago

4????

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If two zero of the polynomial x rase to 4-6 X'cube-26x square+138x-35 are 2+or- of root3, find the zeros

Posted by Gokuladasan. Kp 6 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

How to score good marks in class 10 board examination ????

Posted by Aditya Dj 6 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Yuvraj Rana 6 years, 1 month ago

By study and stay on cbse guide for good updates and knowledge

1Thank You

Shreya S❤ 6 years, 1 month ago

Bhott jldi yad aagya.. But not possible in such a short time. Just. Try to revise what you have already learnt

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Sin3x= 3sinx-4sin3x

Posted by Manshi Verma 6 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Shreya S❤ 6 years, 1 month ago

Hey, This question is of class 11

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ANSWER

The larger of two supplementry angles exceeds the smaller by 18 degree . Find them

Posted by Vivek Kumar 6 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Parth Sharma 6 years, 1 month ago

81 and 99

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ANSWER

If Sin theta+cos theta=root3,then prove that tan theta+cot theta =1

Posted by Mohd Javed 6 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Simerjeet Kaur 6 years, 1 month ago

Proof : sin + cos = root3 S.B.S Sin2+cos2+2sincos=3 1+2sincos=3 2sincos=2 Sincos=1 Now, Tan=sin/cos and cot =cos/sin Take lcm Sin2+cos2/sincos=1 Hence proved

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ANSWER

Prove that )5 is irrational number

Posted by yada****@***** 6 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Yogita Ingle 6 years, 1 month ago

Let take √5 as rational number
If a and b are two co prime number and b is not equal to 0.
We can write √5 = a/b
Multiply by b both side we get
b√5 = a
To remove root, Squaring on both sides, we get
5b² = a² ……………(1)
Therefore, 5 divides a² and according to theorem of rational number, for any prime number p which is divides a² then it will divide a also.
That means 5 will divide a. So we can write
a = 5c
and plug the value of a in equation (1) we get
5b² = (5c)²
5b² = 25c²
Divide by 25 we get
b²/5 = c²
again using same theorem we get that b will divide by 5
and we have already get that a is divide by 5
but a and b are co prime number. so it is contradicting .
Hence √5 is a non rational number

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Broken Soul 6 years, 1 month ago

<a href ="https://www.google.com/amp/s/www.teachoo.com/amp/1471/489/Ex-1.3--1---Prove-that-root-5-is-irrational/category/Ex-1.3/"> Kindly check here for answer

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Evaluate : ( 1 + √3i )( 2 + √3i )

Posted by Broken Soul 6 years, 1 month ago

CBSE > Class 10 > Mathematics