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

Let the positive root be x and the negative be -x. Sum of roots=-( coefficient of x/coefficient of x*2) 0= -b/a, o = b/a, b= 0 is the required condition

3Thank You

ANSWER

Cosec 4theta =2/√3 , find value of theta

Posted by Taran Tpk 4 years, 7 months ago

CBSE > Class 10 > Mathematics

3 answers

Mohit Lamba 4 years, 6 months ago

Theta is 15

1Thank You

Rithika Gautam 4 years, 7 months ago

Theta =π/12

1Thank You

Sounak Chatterjee 4 years, 7 months ago

theta=15

0Thank You

ANSWER

Sin theta +sin theta =1 , if theta1=30 , find value of theta

Posted by Taran Tpk 4 years, 7 months ago

CBSE > Class 10 > Mathematics

1 answers

E Christopher 4 years, 7 months ago

https://www.google.com/url?sa=t&source=web&rct=j&url=http://cbseacademic.nic.in/web_material/SQP/ClassX_2019_20/MathematicsStandard_SQP.pdf&ved=2ahUKEwjnybOVi-TuAhVVXSsKHfQRDX0QFjAAegQIBBAC&usg=AOvVaw1bwd9hxAWzKsEk_BbwmTXQ&cshid=1613124052073

0Thank You

ANSWER

A man travels 500 km partly by train and partly by bus. He takes 5 hour 30 minutes, if he travels 300 km by train and rest by bus. If he travels 260km by train and 240km by bus, he takes 6 minutes longer. Find the speed of the train and bus separately.

Posted by Anumit Gupta 3 years, 3 months ago

CBSE > Class 10 > Mathematics

1 answers

1015 Kriti Jain 4 years, 2 months ago

amswer?

2Thank You

ANSWER

write the quadratic polynomial where sum of zero is 3 and product of zero is -4

Posted by Aanchal Yadav 4 years, 7 months ago

CBSE > Class 10 > Mathematics

1 answers

Prachi Gupta 4 years, 7 months ago

x^2−(sum of zeros)x+(product of zeros) Sum of roots = alpha +beta =-b/a =3 Product of roots =alpha.beta =c/a = -4 So, the Quadratic polynomial is X^2 - (3)x +(-4) =x^2 - 3x -4

1Thank You

ANSWER

Write the prime factor of 186

Posted by Aanchal Yadav 4 years, 7 months ago

CBSE > Class 10 > Mathematics

1 answers

E Christopher 4 years, 7 months ago

I don't know ??

0Thank You

ANSWER

If the diameter of the base of cone is 10cm and it's height is 12cm find curved surface area

Posted by Anshika Thakur 4 years, 7 months ago

CBSE > Class 10 > Mathematics

1 answers

Nishant Chauhan 4 years, 7 months ago

Csa=204.29

0Thank You

ANSWER

2+2÷8

Posted by Dimple Dimple 4 years, 7 months ago

CBSE > Class 10 > Mathematics

5 answers

Jattin Meghani 4 years, 6 months ago

9/4

0Thank You

Rithika Gautam 4 years, 7 months ago

1/4

0Thank You

Nishant Chauhan 4 years, 7 months ago

9/4

1Thank You

Ritik Garg 4 years, 7 months ago

2.25

0Thank You

Dimple Dimple 4 years, 7 months ago

2+2÷2

0Thank You

ANSWER

Solve graphically x+y=10 and x-y=4

Posted by Madesh Madesh 4 years, 7 months ago

CBSE > Class 10 > Mathematics

1 answers

Ayushi Agrawal 4 years, 7 months ago

X+y= 10.............(i) X-y= 4................(ii) Taking I X + y = 10 X =10-y Let, y=5 So, x=10-y X=10-5 X=5 Let, y =4 So, x=10-4 X=6 Let y =6 So, x=10-6 X=4 Now taking equation. (ii) X-y=4 X=4+y Let ,y=1 So, x=4+1 X=5 Let, y=0 So, x=4+0 X=4 Let, y =2 So, x=4+2 X=6 Here the coordinates for equation (i) are A(5,5) ;B(6,4) ; C(4,6) Here the coordinates for equation (ii)are A(5,1);B(4,0);C(6,2). Draw the coordinates on graph . I cannot send the pic of graph.

4Thank You

ANSWER

How many multiples of 4 lies between 10 and 250

Posted by Anurag Yadav Yadav 4 years, 7 months ago

CBSE > Class 10 > Mathematics

2 answers

Jattin Meghani 4 years, 6 months ago

0Thank You

Ayushi Agrawal 4 years, 7 months ago

2Thank You

ANSWER

Tan A = root 2 - 1 , show that SinA ×CosA = root 2/4

Posted by Archi Jain 4 years, 7 months ago

CBSE > Class 10 > Mathematics

2 answers

Sachin Yadav 4 years, 7 months ago

Samajh mein aya bro

1Thank You

Sachin Yadav 4 years, 7 months ago

TanA. = √2-1, tan*2A=(√2-1)*2,tan^2A=2+1-2√2, 1+tan^2A= 4-2√2, sec^2A= 4-2√2, cos^A= 1/4-2√2,. Cos^2A= 4+2√2/8,. Sin^2A= 1-cos^2A, sin^2A= 4-2√2/8,. Sin^2A×cos^2A= (4-2√2)×(4+2√2)/8×8. (SinAcosA)^2= 8/64,. (SinAcosA)^2= 2/16,. SinAcosA= √2/4 proved

2Thank You

ANSWER

How i will know that 1231 is a prime number or not.( i.e- 3457

Posted by Niyz Uddin 4 years, 7 months ago

CBSE > Class 10 > Mathematics

2 answers

Amit Gaming 4 years, 7 months ago

Prime factorisation se pata kar sakte ho

0Thank You

Aaryan Pareek 4 years, 7 months ago

Firstly make factors of it

3Thank You

ANSWER

If the ratio of sum of the first n terms of two AP's is (7n-1):(4n+27).Find ratio of their m th terms

Posted by Ankita Kalal 4 years, 7 months ago

CBSE > Class 10 > Mathematics

2 answers

Hemang Dubey 4 years, 7 months ago

Sn1/Sn2 = 7n-1/4n+27 Make the equations , a+(n-1/2)d/a2+(n-1)=7n-1/4n+27 Now, am1/am2=a1+(m-1)d/a2+(m-1)d2 Now compare n-1/2=m-1 You will get n=2m-1 Just put the values you will get the answer .

1Thank You

Hemang Dubey 4 years, 7 months ago

Answer is (14m-6):(8m+23)

1Thank You

ANSWER

Probe that √5 is irrational

Posted by Manikandan M 4 years, 7 months ago

CBSE > Class 10 > Mathematics

1 answers

Ayush Kumar 4 years, 7 months ago

Let us assume that √5 is a rational number. Sp it t can be expressed in the form p/q where p,q are co-prime integers and q≠0 ⇒√5=p/q On squaring both the sides we get, ⇒5=p²/q² ⇒5q²=p² —————–(i) p²/5= q² So 5 divides p p is a multiple of 5 ⇒p=5m ⇒p²=25m² ————-(ii) From equations (i) and (ii), we get, 5q²=25m² ⇒q²=5m² ⇒q² is a multiple of 5 ⇒q is a multiple of 5 Hence, p,q have a common factor 5. This contradicts our assumption that they are co-primes. Therefore, p/q is not a rational number √5 is an irrational number Hence proved????

0Thank You

ANSWER

Pythogarsas theorem

Posted by Mahek Desai 4 years, 7 months ago

CBSE > Class 10 > Mathematics

2 answers

Priya Tomar 4 years, 7 months ago

It states that the area of the square whose side is the hypotenuse is equal to the sum of the areas of the squares on the other two sides.

1Thank You

A S 4 years, 7 months ago

In a right angle triangle the square of hypotenuse is equal to the the sum of squares of of other two sides

1Thank You

ANSWER

Rajan is having a garden near Delhi

Posted by Aditi Dubey 4 years, 7 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Chapter surface area and volume exercise 13.1

Posted by Supriya Thami 4 years, 7 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Find the roots of the following quadratic equation by factorisation method 5x^2-14x+6=0

Posted by Vidhyabharathi Ravi 4 years, 7 months ago

CBSE > Class 10 > Mathematics

2 answers

Manisha Shetty 4 years, 7 months ago

Real numbers

0Thank You

Dhyan Chawda 4 years, 7 months ago

5x2 - 14x + 6=0 5x2-5x-6x+6 5x(x-1)-6(x-1) (x-1)(5x-6) x-1=0 & 5x-6=0 x=1 & x=6/5

1Thank You

ANSWER

the wheel of a car of diameter 80cm each. How many complete revolution does each wheel make in 10 minutes when the car is travelling at a speed of 66km per hour

Posted by Amar Singh 4 years, 7 months ago

CBSE > Class 10 > Mathematics

2 answers

Rohit Meshram 4 years, 7 months ago

Hii freinds Here, distance= speed / time Therefore,speed= 66 km/hr. Time=10 min = 10/60 hr. = 1/6hr. Putting value in formula, Distance=speed/ time Distance=66/1/6 Now, Distance= 66×1/6 Distance= 11 km. Distance= 11 11×1000m 11000m 11000×100cm 1100000cm Now, No.of revolution=total distance/dist.covered in 1 revolution 1100000/80×22/7 110000/8×22/7 110000×7/8×22 4375 Hence, No.of revolution = 4375.

1Thank You

Ankur Yadav 4 years, 7 months ago

since the car is travelling at speed of 66km/h then it will cover distance of 66000/60 m/minute=1100 m/minute Now if car is moving for 10min then distance covered =11000m Circumference of wheel=17.6/7 Then no. of revolution=11000/17.6/7=11000*7/17.6=4375times

0Thank You

ANSWER

Derive phytagoras theorem

Posted by Lokireddy Anjaneyareddy 4 years, 7 months ago

CBSE > Class 10 > Mathematics