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

Ask questions which are clear, concise and easy to understand.

Ask Question

Prove that sec A (1-sin A ) ( sec A + tan A) =1

Posted by Nandani Guru 5 years, 11 months ago

1 answers

Sachin Mahto 5 years, 11 months ago

SecA(1-sinA) (secA+tanA) =1/cosA(1-sinA) (1/cosA +sinA/cosA) =1/cosA(1-sinA) (1+sinA/cosA) =1/cosA(1-sinA) 1/cosA(1+sinA) =1/cos squareA (1-sin square A) =1/cos square A × cos square A =1

0Thank You

ANSWER

Q. In a triangle, AD is perpendicular to BC. Prove that AB square +CD square=ACsquate +BD square

Posted by Virendra Chouhan 5 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Let p(x) be a polynomial of degree more than 2. when p(x) is divided by x-2 it leaves remainder 1 and when it is divided by x-3 it leaves remainder 3.Find the remainder ,when p(x) is divided by (x-2)(x-3).?

Posted by Aditya Bala 5 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Check whether x³-3x+1 is factor of x⅝-4x³+x²+3x+1

Posted by Tsering Wangchu 5 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

How to prove root five as irriational number

Posted by Pasang Lhundup 5 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Please show as all assessment paper maths

Posted by Yash Rajput 5 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Ranjan Jha Jonki 5 years, 11 months ago

Yes

0Thank You

ANSWER

If volume of a cuboid is 216 cubic centimetres and its total surface area is 200 sq. centimetres.Then find its base area ?

Posted by Shashi Prakash 5 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Let sn be the sum of the first n terms of an AP.if S2n =3n +14n2.then what is the common difference

Posted by Kusum Singh 5 years, 11 months ago

CBSE > Class 10 > Mathematics

3 answers

Suman Chauhan 5 years, 11 months ago

Yuuhhh

1Thank You

Lucifer ? Morningstar? 5 years, 11 months ago

Maybe -56

1Thank You

Kusum Singh 5 years, 11 months ago

Kkkk

0Thank You

ANSWER

In fig.10.37,angle pqr=100 degree , where p,q and r points on circle with centre o.find angle opr

Posted by Aryan Verma 5 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Mohammad Saifullah 5 years, 11 months ago

80°

1Thank You

Aryan Verma 5 years, 11 months ago

Answer

3Thank You

ANSWER

Site 30 degree cos 30 degree + Cos 60 degree sin 30 degrees solve

Posted by Satyam Singh 5 years, 11 months ago

CBSE > Class 10 > Mathematics

5 answers

Maheshchandermodi Maheshchandermodi 5 years, 11 months ago

Khud kro easy h

1Thank You

Aviral Goyal 5 years, 11 months ago

The correct answer underroot3 +1/4

1Thank You

Maheshchandermodi Maheshchandermodi 5 years, 11 months ago

0Thank You

Aadya Singh ? 5 years, 11 months ago

Or √3/2..

3Thank You

Aadya Singh ? 5 years, 11 months ago

(2√3)/4

3Thank You

ANSWER

Hots question with answer

Posted by Tushar Kathe 5 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

If Sn denotes the sum of first n terms of an AP then prove that S12= 3 (S8 - S4)

Posted by Gargi Sharma 5 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Harsh Raj 5 years, 11 months ago

L.H.S ; S12= 12/2{2a + (12-1)d} = 6{2a + 11*d} = 12a + 66d R.H.S ; 3(S8 - S4) =3[n/2{2a+(n-1)d} - n/2{ 2a+(n-1)d}] = 3{8/2(2a+7d) - 4/2{2a+3d)} =3{4(2a+7d) - 2(2a+3d)} =3(8a+28d - 4a-6d) =3(4a+22d) =12a+66d Therefore ; L.H.S = R.H.S Proved......?????????????????????????????????????????????????

3Thank You

ANSWER

The points (7,2) and (-1,0) lie on a lie a) 7y=3x-7 b)4y=x+1 c)y=7x+7 d)x=4y+1

Posted by Piyush S 5 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Aviral Goyal 5 years, 11 months ago

0Thank You

ANSWER

Maths Exercise 6.3 qes.16

Posted by Salim Barkathu 5 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

√2xsquar-2x-√3

Posted by Deepak Kumar 5 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Find the sum of all natural number less than 100 which are divisible by 5

Posted by Abhi Shakya 5 years, 11 months ago

CBSE > Class 10 > Mathematics

3 answers

Aviral Goyal 5 years, 11 months ago

Last term should be 95 not 100 bcos in question it is less than 100 so sum will be 950

0Thank You

Aviral Goyal 5 years, 11 months ago

Parishi ur answer is wrong

0Thank You

Parishi Thada 5 years, 11 months ago

AP formed will be- 5,10,15.......100 So, a=5 d=5 an=100 n=? an= a+(n-1)d 100=5+(n-1)5 95= 5n-5 5n = 100 n=20 Putting these values in the sum formula we get, Sn=n/2 [ 2a+(n-1)d] S20= 20/2 [ 2(5) + (19)5] S20=10[10+95] S20=10[105] S20=1050 ANS. Hope it helps

0Thank You

ANSWER

What is the identity of (a+b)³=?

Posted by Class 12 5 years, 11 months ago

CBSE > Class 10 > Mathematics

3 answers

Mohammad Saifullah 5 years, 11 months ago

a^3+b^3+3a^2b+3ab^2

1Thank You

Raj Clasher 5 years, 11 months ago

a3+b3 3ab(a+b)

1Thank You

Shreya ... 5 years, 11 months ago

a^3+b^3+3ab(a+b)

8Thank You

ANSWER

The largest number which divides 70 and 125 leaving reminders 5 and 8 respectively is, explain?

Posted by Frince Frince T Francis 5 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Gaurav Seth 5 years, 11 months ago

The largest number by which x , y divisible and gives the remainder a , and b is the HCF of ( x - a ) and ( y - b)
__________________________

According to the given problem ,

The largest number which divides 70 and 125 leaving remainders 5 and 8 respectively are

HCF of ( 70 - 5 ) = 65 and

( 125 - 8 ) = 117

65 = 5 × 13

117 = 3 × 3 × 13

HCF ( 65 , 117 ) = 13

Required number is 13.

2Thank You

ANSWER

If cosA + cos^2A = 1, then prove that ; Sin^12A + 3sin^10A + 3sin^8A +sin^6A + 2sin^4A + 2sin^2A -2 = 1.?????????????????????

Posted by Harsh Raj 5 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

HCF of 726 and 275

Posted by Kuldeep Malik 5 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Harsh Raj 5 years, 11 months ago

726 = 275*2 + 176 275 = 176*1 + 99 176 = 99*1 + 77 99 = 77*2 + 22 77 = 22*3 + 11 22 = 11*2 +0 Therefore ; H.C.F = 11.. ??????

1Thank You

ANSWER

7x_15y=2 ,x+2y=3 solved

Posted by Vishal Kumar 5 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Harsh Raj 5 years, 11 months ago

7x-15y=2.........1 7(X+2y)=3*7..........2 From eq.1 &eq.2 7x - 15y = 2 7x +14y = 21 ...↑-....↑-........↑-........... 0 -29y = -19 Therefore; y = -19/-29 Y = 19/29???????? Putting the value of "Y" in eq.2 X + 2y = 3 X + 2(19/29)=3 X +2*19/29 = 3 X = 3 - 38/29 X = 49/29??????? Hence; X = 49/29 and Y = 19/29....

0Thank You

ANSWER

The remaider when the square of any prime no. greater than 3is divided by 6 is

Posted by Vaani Vaani 5 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Mohammad Saifullah 5 years, 11 months ago

0Thank You

ANSWER

Important theorem

Posted by Mohit Kumar 5 years, 11 months ago

CBSE > Class 10 > Mathematics

3 answers

Adarsh Adarsh 5 years, 11 months ago

Theorem 6.1, 6.2, 6.6, 6.8, 6.9, 10.1, 10.2

0Thank You

Vikas Saini 5 years, 11 months ago

Important theorem is 6. First five are in the chapter triangles and one is in the chapter construction

2Thank You

Ashish Athghara 5 years, 11 months ago

Triangle me acha theorem hai

1Thank You

ANSWER

If 2 and 3 are the zeros of polynomial 3x²-2kx+2m.find the value of k and m?

Posted by Lucifer ? Morningstar? 5 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 5 years, 11 months ago

Let p(x) = 3x²-2kx+2m

Given, 2 & 3 are zeroes of p(x).
Then , p (2) = 0 & p(3)= 0

Now, p(2)= 3×2²-2k(2)+2m=0

3× 4-4kx+2m=0

12-4k+2m=0………..(1)

p(3) = 3×3²-2k(3)+2m=0

3× 9-6kx+2m=0

27-6k+2m=0………..(2)

On Subtracting Equation 1 from equation 2.

27-6k+2m=0
12-4k+2m=0
(-) (+) (-)
------------------
15-2k =0

15=2k

k= 15/2

On putting k= 15/2 in eq 1

12-4k+2m=0

12-4(15/2)+2m=0

12-30+2m=0

-18+2m=0

2m=18
m=18/2
m=9

Hence, k=15/2, m= 9

0Thank You

ANSWER

write whether 4under root 45+3under root 20 /2under root 5 on simplification gives an irrational or a rational number

Posted by Rekha Raj 5 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

(. )+(. )+(. ):30 Choose the number below: 11,13,15,17

Posted by Piyush Yadav 5 years, 11 months ago

CBSE > Class 10 > Mathematics

5 answers

Piyush Yadav 5 years, 11 months ago

Put the number given

0Thank You

Piyush Yadav 5 years, 11 months ago

Don't add anyone

1Thank You

Aadya Singh ? 5 years, 11 months ago

(11)+(15)+(17-13)= 30....Ab sahi h...?

3Thank You

Vikas Saini 5 years, 11 months ago

Where is 15adya singh all numbers are compulsory ??

2Thank You

Aadya Singh ? 5 years, 11 months ago

(11) + (13)+(17-11) = 30...

5Thank You

ANSWER

Prove that the quadrilateral circumscribing the circle is rhombus

Posted by Piyush Yadav 5 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Si sin minus Cos y Sin A + Cos A + sin a + cos my minus minus cos squared minus one

Posted by Rohit Rahaman Scientists 5 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

hari standing of the top of a building sees the top of a tower at angle elevation so the foot of the tower at angle of depression 60 hari is 1.6m tall and high of the building on which is standing is 9.2m How far is the tower from building calculate the height of the building

Posted by Arpit Jain 5 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

X+y=5 and 2x-3y=4

Posted by Satyajeet Swain 5 years, 11 months ago

CBSE > Class 10 > Mathematics

3 answers

Sambhav Maheshwari 5 years, 11 months ago

X+y=5 (1) 2x-3y=4. (2) Eq(1) multiply by 2 2x+2y=10 (3) From eq(3) and eq(1) 2x+2y=10. (3) 2x-3y=4. (1) (-) (+) (-) ................................ 5y=6 y=6/5 Put the value of y in eq(1) X+6/5=5 X=5-6/5 X=25-6/5 X=19/5 (x=19/5, y=6/5 ) ans

0Thank You

Yogita Ingle 5 years, 11 months ago

X + y = 5 ( equation 1 )
2x - 3y = 4 ( equation 2 )
Now,
multiplying (eq.1) by 2 and subtracting (eq.2) from ( eq.1 )
(2x + 2y = 10) - (2x - 3y = 4 )
=> 2x + 2y - 2x + 3y = 6
=> 5y = 6
=> y = 6/5
Putting the value of y in ( eq.1 )
=> x+ y = 5
=> x + 6/5 = 5
=> x = 5 - 6/5
=> x = 19/5

0Thank You

Piyush Yadav 5 years, 11 months ago

X:13/5 y: 6/5

0Thank You

ANSWER