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

Let there be two triangles ABC and PQR such that angle C=90⁰ and angle R=90⁰ now, sinB = AC/AB and SinQ=PR/PQ since, sinB = SinQ ⇒ AC/AB = PR/PQ ⇒ AC/PR = AB/PQ and also angleC = angleR ⇒ by SAS similarity, ∆ABC is similar to ∆PQR since corresponding angles of similar triangle are equal ⇒ angleB = angleQ

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X pow 4+ x3_ 34x sq_4x+120 the zeros are 2,_2 find other two roots

Posted by Pramila Mohan 5 years, 5 months ago

CBSE > Class 10 > Mathematics

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If tan a =5 then cot a equal to?

Posted by Ahmed Adnan 5 years, 5 months ago

CBSE > Class 10 > Mathematics

2 answers

Surbhi Jain 5 years, 5 months ago

1/5

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Backia Kalai 5 years, 5 months ago

1/5

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How to learn trigonometry lesson ?

Posted by Vikram Sah 5 years, 5 months ago

CBSE > Class 10 > Mathematics

2 answers

Shashank Sah 5 years, 5 months ago

Practice makes man prefect . ....watch video of dear sir on you tube it will help you a lot ...... Best of luck ??????

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?Royal Thakur? 5 years, 5 months ago

Practice more and more... Watch video of "dear sir " On YouTube it will help you a lot... Best of luck.... ?

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Is there any changes in class 10syllabus

Posted by Manisha Sangwan 5 years, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Harsh Kumar 5 years, 5 months ago

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If alfa and beta are roots of n^+5n-1=0 then find 1) alfa^3+beta^3 2) alfa^2+beta^2

Posted by Shruti Shinde 5 years, 5 months ago

CBSE > Class 10 > Mathematics

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The difference between the roots of the equation x^2-13x+k=0 is7 find k

Posted by Shruti Shinde 5 years, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Anuj Avhad 5 years, 5 months ago

k=12

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By,the herons formula, the area of triangle ABC is given by triangle= so. unit

Posted by Lobsang Kaldan 5 years, 5 months ago

CBSE > Class 10 > Mathematics

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If alfa and bita are two roots of quadratic equation 2x^2+6x-5 then find alfa+bita and alfa×bita

Posted by Shruti Shinde 5 years, 5 months ago

CBSE > Class 10 > Mathematics

3 answers

Vicky Kumar 5 years, 5 months ago

C by A =-5 by 2 C/A=-5/2

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Anuj Avhad 5 years, 5 months ago

=alpha* beta =c/a =-5/2

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Anuj Avhad 5 years, 5 months ago

=alpha+ beta = -b/a =-6/2 =-3

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Solve by elimination method , x-y + 1 = 0, 3x +2-12 =0

Posted by ?Suhani Arora? 5 years, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Anuj Avhad 5 years, 5 months ago

there is no another variable in second equation so it can only be solved by substitution method

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Exercise 5.1 alll questions

Posted by Harsh Ghotra 5 years, 5 months ago

CBSE > Class 10 > Mathematics

2 answers

Anushka Negi 5 years, 5 months ago

Lazypan chod do board h

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Charatveer Sandhu 5 years, 5 months ago

Apne aap karna seekho

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3x^2- 2root6x +2=0

Posted by Shruti Shinde 5 years, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

꧁༒RคМคห༒꧂ . 5 years, 5 months ago

3 x^{2} -2√6x+2=0 3 x^{2} -√6x-√6x+2=0 √3 x^{2} *√3 x^{2} -√3x*√2x-√3x*√2x+√2*√2=0 √3x(√3x-√2)-√2(√3x-√2)=0 (√3x-√2)(√3x-√2)=0 x=√2/√3 Therefore the equation has two equal roots √2/√3

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How many term of AP 17,15,13, 11 whose n th term is -47

Posted by Mukesh Kumar 5 years, 5 months ago

CBSE > Class 10 > Mathematics

2 answers

Anuj Avhad 5 years, 5 months ago

a=17, d=-2, an=a+(n-1)d___ -47=17+(n-1)(-2)___ -47=17-2n+2___ -47=19-2n___ -47-19=-2n___ -66=-2n___ n=33

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Sejas Patil 5 years, 5 months ago

How we solve linear equation

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Factories 8x + 16x

Posted by Manish Kumar 5 years, 6 months ago

CBSE > Class 10 > Mathematics

2 answers

Anuj Avhad 5 years, 5 months ago

8x+16x=8x(1+2)=8x*3

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Manish Kumar 5 years, 6 months ago

8x(1+2)

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What are the basic questions of probability ????

Posted by Ashnoor Kamboj 5 years, 6 months ago

CBSE > Class 10 > Mathematics

2 answers

Priyanshu Maurya 5 years, 5 months ago

Thanks

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Riya Shankar 5 years, 6 months ago

Cards question dice question

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If our answer is little bit differ at decimal places to the answer sheet then the sum is correct or not ? Ex. My answer =346.242 and answer in answersheet is 346.514

Posted by Ansh Sharma 5 years, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Vikram Sah 5 years, 5 months ago

Yes it is correct because it is approx

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If theeta=1/√7,then cosec2theeta-sin2theeta/cosec2theeta+sec2theeta =

Posted by Kavya Mehra 5 years, 6 months ago

CBSE > Class 10 > Mathematics

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How to do factorisation process for quadratic equation for large numbers

Posted by Adharsh Rp 5 years, 6 months ago

CBSE > Class 10 > Mathematics

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Find an of 96 , 87 ........................

Posted by Manvi Jain 5 years, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Rajan Kumar Pasi 5 years, 6 months ago

Sol: a₁ = 96
a₂ = 87
d = a₂ - a₁= 96 - 87 = 9
a_n = a₁ + (n-1) d
a_n = 96 + (n-1) 9
a_n = 96 + 9n - 9
a_n = 87 + 9n .
If the value of the 'n' is given, then put it into the above equation.
Otherwise, the equation is the final answer.
:-)

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One equation of a pair of dependent linear equations is – 5x+ 7y – 2 = 0. The second equation can be

Posted by Rohit Jadon 5 years, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Rajan Kumar Pasi 5 years, 6 months ago

For what kind of dependency you are asking?

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what is trigonometric

Posted by Lucky Chauhan 5 years, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Birendra Mishra 5 years, 6 months ago

The branch of mathematics in which we study about triangles is known as trigonometry.

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17/40 write the answer by not divide them.

Posted by Rinku Shah 5 years, 6 months ago

CBSE > Class 10 > Mathematics

2 answers

Manvi Jain 5 years, 6 months ago

17/40 Prime factorise both number 17=17/ 40=2×2×2×5 There is terminating decimal because is in form of2^n 5^ m. So we multiple both number by 5×5=5^2 17 ×5×5 /40×5×5 =425/1000 =425.

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Sakshi Rohilla 5 years, 6 months ago

17/5^1*2^3 = 17*5^2/5^3*2°3 = 17*25/10^3 =425/1000=0.425

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If alpha and beta are the quadratic polynomial x square + PX + q are the

Posted by Suraj Mishra 5 years, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Manvi Jain 5 years, 6 months ago

Can you write the questions clearly

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The layer of two supplementary angles exceeds the smaller by 20 degrees. Find the angles

Posted by Jaidev Mandhan 5 years, 6 months ago

CBSE > Class 10 > Mathematics

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Find HCF of 135 and 225 by other methods

Posted by Deepanshu Awasthi 5 years, 6 months ago

CBSE > Class 10 > Mathematics

2 answers

Manvi Jain 5 years, 6 months ago

Divison method , eculid's algorithm lemma , prime factorization method

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Yogita Ingle 5 years, 6 months ago

Here 225 > 135 we always divide greater number with smaller one.
Divide 225 by 135 we get 1 quotient and 90 as remainder so that
225= 135*1 + 90
Divide 135 by 90 we get 1 quotient and 45 as remainder so that
135= 90*1 + 45
Divide 90 by 45 we get 2 quotient and no remainder so we can write it as
90 = 2*45+ 0
As there are no remainder so deviser 45 is our HCF

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Are last year's board papers available?

Posted by Naina Sharma 5 years, 6 months ago

CBSE > Class 10 > Mathematics