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

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

Ask Question

If ad not equal to bc then prve that the equation (a square +b square)x suare +2(ac+bd)x +c suare +d sqiare)=0

Posted by Lucky Yadav 3 years ago

1 answers

Discriminant, D=4(ac+bd) 2 −4(a 2 +b 2 )(c 2 +d 2 ) D=4[(ac+bd) 2 −(a 2 +b 2 )(c 2 +d 2 )] D=4[a 2 c 2 +b 2 d 2 +2acbd−a 2 c 2 −a 2 d 2 −b 2 c 2 −b 2 d 2 ] D=4[2acbd−a 2 d 2 −b 2 c 2 ] D=−4[a 2 d 2 +b 2 c 2 −2adbc] D=−4(ad−bc) 2 We have, ad  =bc Therefore, ad−bc  =0 (ad−bc) 2 >0 −4(ad−bc) 2 <0 D<0 Hence, the given equation has no real roots.

2Thank You

ANSWER

Write the common difference of an arithmetic progression 8, 5, 2 - 1

Posted by Amogh V Patil Amogh 3 years ago

CBSE > Class 10 > Mathematics

5 answers

Khushi Kushwaha 3 years ago

-3 is the right answer of your question

1Thank You

Tutun Kumar Sahu X-B-655 3 years ago

0Thank You

Sanyam Sinha 3 years ago

3 is the common difference i.e D

0Thank You

Anam Kumar 3 years ago

Common difference = a2-a1 =5-8 =-3 (Ans)

1Thank You

Subhi Gupta 3 years ago

-3

2Thank You

ANSWER

If the distance between the points (x,-1) and (3, 2) is 5, then the value of x is a)-7 or -1 b) -7 or 1

Posted by Gctctc Gotwani 3 years ago

CBSE > Class 10 > Mathematics

2 answers

Saksham Singh 3 years ago

0Thank You

Gctctc Gotwani 3 years ago

Czbb

0Thank You

ANSWER

In exercise 10.2 which are the deleted questions?

Posted by Tanisha Godara 3 years ago

CBSE > Class 10 > Mathematics

1 answers

Maahi Bhura 3 years ago

In 10.2 Exercise of Maths, No questions are deleted And in the same, 9-13 are IMP questions

3Thank You

ANSWER

If cos A = 4/5 then cot A

Posted by Divyansh Verma 3 years ago

CBSE > Class 10 > Mathematics

4 answers

Radhika Miglani 3 years ago

4/3

0Thank You

Rohan Kumar 3 years ago

4/3

0Thank You

Khushi Singh Singh 3 years ago

84 ka

0Thank You

V.Madhumitha Mitha 3 years ago

4/3

1Thank You

ANSWER

The below 👇 question table is Height ( cm) | frequency| c.f. 150-155. | 12. | a 155-160. |. b. | 25 160-165. |. 10. | c 165-170. |. d. | 43 170-175. |. e. | 48 175-178. |. 2. | f |Total (f)= 50|

Posted by Chandan Kumar 3 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Find the unknown entires a, b, c, d, e and f in the following distribution and hence find their mode

Posted by Chandan Kumar 3 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

In triangle ABC, right angled at B, if tanA=1/root3, find the value of : (i) sinA cosC + cosA sinC (ii)cosA cosC – sinA sinC

Posted by Adwaith Sunil 3 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Shreya Gupta 3 years, 1 month ago

Given TanA=1/√3=P/B H^2=P^2+B^2 H^2=(1)^2+(√3)^2 H^2=1+3 H=√4 H=2 Then, SinA=P/H=BC/AC=1/2 SinC=P/H=AB/AC=√3/2 CosA=B/H=AB/AC=√3/2 CosC=B/H=BC/AC=1/2 Hence, (i)sinA cosC + cosA sinC =1/2 × 1/2 + √3/2 × √3/2 =1/4 + 3/4 =4/4 =1 answer Hence, (ii)cosA cosC – sinA sinC =√3/2 × 1/2 - 1/2 × √3/2 =√3/4-√3/4 =0 answer

1Thank You

ANSWER

Gopi buys a fish from shop for his aquarium . the shopkeeper takes out of one fish at random from a tank containing 5 mail and 8 female fish what is the probability of that the fish he taken out is a male fish

Posted by Subhash Chand 3 years, 1 month ago

CBSE > Class 10 > Mathematics

3 answers

Surbhi Pandey 3 years ago

5/13

1Thank You

Bhartendu Kushawah 3 years, 1 month ago

5/13

2Thank You

Omya Aryan 3 years, 1 month ago

5/13

2Thank You

ANSWER

Why π=180 degree

Posted by Akhil .S 3 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Saurav Kumar 3 years ago

0Thank You

ANSWER

Definition polynomial

Posted by Surya Singh 3 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Chinki 🦋👈🏻 3 years, 1 month ago

In which power of variables is whole number..

4Thank You

ANSWER

Let a and b be two positive integers such that a = p3q4 and b = p2q3, where p and q are prime numbers. If HCF(a, b) = pmqn and LCM(a, b) = prqs, then (m+n)(r+s)=

Posted by Vidit Bhutada 3 years, 1 month ago

CBSE > Class 10 > Mathematics

3 answers

Ashish Rana 3 years ago

0Thank You

Prabhat Ranjan 3 years ago

1Thank You

Prabha . 3 years, 1 month ago

Ans 35

1Thank You

ANSWER

In a class test, the sum of shefali's marks in Mathematics and English is 30. Had she got 2 marks more in Mathematics and 3 marks less in English, the product of their marks would have been 210. Find her marks in the two subjects.

Posted by Omya Aryan 3 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Diamond Girl 3 years, 1 month ago

You can take any two numbers as x = 17 and 18 So if marks in English 17 then marks in math is 13 If marks in english is 18 then marks in math is 14

2Thank You

Jayesh Meena 3 years, 1 month ago

Shefali -x

2Thank You

ANSWER

Sum of all possible values of ×if 431×55is divisible by 5

Posted by Gagandeep Kaur 3 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

If the system of equations 3x+y=1 and 2(k-1)x+(k-1)y=2k+1 is inconsistent then k=?

Posted by Arshpreet Kaur 3 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Aditya Yadav 3 years, 1 month ago

Adgfxg

1Thank You

ANSWER

Draw the graph of the equation x+3y=3 and 2x-3y=12 Determine the co-ordinates of the vertices of triangle formed by the these lines and the Y-axis. Shade the triangle and find its area.

Posted by Lipika Yadav 3 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Number of letters 1-4 /6 4-7/30 7-10 /40 10-13/16 13-16/4 16-9 /4 Find means by direct method assume mean and step deviation find mode & median also

Posted by Zoya Khan 3 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

The angle of elevation of an aeroplane from a point on the ground is 45°. After flying for 15 seconds, the elevation change to 30°. If the aeroplane is flying at a height of 2500 m, find the speed of the aeroplane.

Posted by 𝕷𝖊𝖌𝖊𝖓𝖉 🏆 🍑 🎀 𝒜𝓁☯𝓃𝑒 𝑅𝒶𝓈𝒽𝒾 🎀 🍑 3 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Jayansh Srivastava 3 years, 1 month ago

439.2km/hr

2Thank You

ANSWER

A circle has number of tangents

Posted by Kashi Talari Talari 3 years, 1 month ago

CBSE > Class 10 > Mathematics

3 answers

Chinki 🦋👈🏻 3 years ago

A circle has infinite number of tangent.......and only one tangent in a point of a circle..

1Thank You

Omya Aryan 3 years, 1 month ago

A circle has infinite number of tangents.

1Thank You

Anshu Yadav 3 years, 1 month ago

In the circle there are only one tangent in a point of a circle

1Thank You

ANSWER

Which of the following metals is less reactive than hydrogen

Posted by Tahzeeb Fatima 3 years, 1 month ago

CBSE > Class 10 > Mathematics

5 answers

Nimesh Negi 3 years ago

Platinum,gold,silver,Mercury,copper is less reactive than Hydrogen.

0Thank You

Chinki 🦋👈🏻 3 years ago

Platinum,gold,silver,Mercury,copper is less reactive than Hydrogen...

1Thank You

Chinki 🦋👈🏻 3 years ago

Platinum<Gold<Silver<Mercury<Copper<Hydrogen<Lead<Iron<Zinc<Aluminium<Magnesium<Calcium<Sodium<Potassium............So... Pt,Au,Ag,Hg,Cu is less reactive than Hydrogen..

1Thank You

Rashi Choure 3 years, 1 month ago

Lead < Iron < Zinc < Aluminium < Magnesium < Calcium < Sodium < Potassium

0Thank You

Anshu Yadav 3 years, 1 month ago

In the reactivity seires hydrogen all metal in the upper

1Thank You

ANSWER

prove underoot 5 is irrational

Posted by Prachi Chhikara 3 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

4x²-4x+3

Posted by Khushi Vanshika Sharma 3 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Chinki 🦋👈🏻 3 years ago

(4x²-4x+3) (4x²-6x+2x+3) [2x(2x-3)+1(2x-3)] [(2x+1)(2x-3)] [(X=-1/2)(X=3/2)]

1Thank You

ANSWER

On Comparing the ratio A1/A2 B1/B2 & C1/C2 find out the whether the lines representing the following pairs of linear equation intersect at a point are parallel or consedent. Also find the solution by graphical X+2y=0 & 3x+4y=20 2x+3y-9=0 & 4x+6y-18=0 X+2y-4=0 & 2x+4y-12=0

Posted by Sirajuddin. Mujawar 3 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

In figure

Posted by Swati . 3 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Vivek Prajapati 3 years, 1 month ago

In which

1Thank You

ANSWER

2 tan30° __________ 1-tan2 30°

Posted by Anant Dhaka 3 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Abdul Hannan 3 years, 1 month ago

2tan30°>1-tan²30°

1Thank You

Tanisk Sahu 3 years, 1 month ago

0Thank You

ANSWER

If A.P. Sn =2n²+3n, find A.P also find its nth term.

Posted by Ananya Gangwar 3 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Vivek Prajapati 3 years, 1 month ago

Am are right?

0Thank You

Vivek Prajapati 3 years, 1 month ago

nth term is 4n+1. And. Ap is 5,9,13,17

0Thank You

ANSWER

Prove that aSin + bcos=+-√a2+b2- C2 If acos -bsin =c

Posted by Geeta Umar 3 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Find the area of quadrilateral ABCD whose vertices are A(1,1), B(7,-3), C(12,2) and D(7,21).

Posted by Reema Gupta 3 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Faisal Khan 3 years, 1 month ago

The coordinates of A,B,C & D are A(1,1),B(7,3),C(12,2),D(7,21). Area of quadrilateral ABCD = Area of triangle ABC + Area of triangle ACD Area of triangle = 2 1 ∣[x 1 (y 2 −y 3 )+x 2 (y 3 −y 1 )+x 3 (y 1 −y 2 )]∣ Area of triangle ABC = 2 1 ∣[1(3−2)+7(2−1)+12(1−3)]∣ = 2 1 ∣[1+7−24]∣ = 2 1 (16)=8 sq. units Area of triangle ACD = 2 1 ∣[1(2−21)+12(21−1)+7(1−2)]∣ = 2 1 ∣[−19+240−7]∣ = 2 1 (214)=107 sq. units Hence, area of quadrilateral ABCD = 107+8=115 sq. units

1Thank You

Bhavishay Chahar 3 years, 1 month ago

Rtfho

0Thank You

ANSWER

Prove that a tangent drawn from the midpoint of an Arc of a circle is parallel to the chord joining the end points of the arc.

Posted by Kirtimaan Kumar 3 years, 1 month ago

CBSE > Class 10 > Mathematics