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How to kind valie of k from missising frequency

Posted by Deep Nikoshe 6 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Puja Sahoo? 6 years, 9 months ago

Complete yur question

ANSWER

in an equilateral triangle ABC, D is a point on the side BC such that BD=1/3BC.prove that 9AD^2=7AB^2

Posted by Chanchal Chhonkar 6 years, 9 months ago

CBSE > Class 10 > Mathematics

3 answers

Gaurav Seth 6 years, 9 months ago

Sol:

Given:   In an equilateral triangle ΔABC. The side BC is trisected at D such that BD = (1/3) BC.

To prove:  9AD²= 7AB²

Construction:  Draw AE ⊥ BC.

Proof :

In a ΔABC and ΔACE

AB = AC ( Given)

AE = AE ( common)

∠AEB = ∠AEC = 90°

∴ ΔABC ≅ ΔACE ( For RHS criterion)

BE = EC (By C.P.C.T)

BE = EC = BC / 2

In a right angled triangle ADE

AD² = AE² + DE² ---------(1)

In a right angled triangle ABE

AB² = AE² + BE² ---------(2)

From equ (1) and (2) we obtain

⇒ AD²- AB² = DE²- BE².

⇒ AD²- AB² = (BE – BD)²- BE².

⇒ AD²- AB² = (BC / 2 – BC/3)²– (BC/2)²

⇒ AD²- AB² = ((3BC – 2BC)/6)²– (BC/2)²

⇒ AD²- AB² = BC²/ 36 – BC²/ 4 ( In a equilateral triangle ΔABC, AB = BC = CA)

⇒ AD²= AB² + AB²/ 36 – AB²/ 4

⇒ AD²= (36AB² + AB²– 9AB²) / 36

⇒ AD²= (28AB²) / 36

⇒ AD²= (7AB²) / 9

9AD²= 7AB².

Nishita Jaisalmeria 6 years, 9 months ago

Ncert mai diya hai

Puja Sahoo? 6 years, 9 months ago

Ncert ka question hai, yu can get the solution in this app

ANSWER

Cbse important question of maths

Posted by Manpreet Singh 6 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Samyukta ... 6 years, 9 months ago

U tube mai ek channel hai Fastest Education name se...usmai hain videos aisi dheer saari...check them out!

ANSWER

Find the middle term of the AP 213,205,197,.....37.

Posted by Vaishnavi ?? 6 years, 9 months ago

CBSE > Class 10 > Mathematics

3 answers

Pranit Somkuwar 6 years, 9 months ago

Given, T1 = 213 = a. T2 = 205. Then, d = T2 - T1. d = 205 - 213. d = - 8. Now, Tn = a + (n - 1) × d. 37 = 213 + (n - 1) × (-8). 37 = 213 - 8n + 8. 37 = 221 - 8n. 8n = 221 - 37. 8n = 264. n = 184/8. n = 23. Hence the total no. of terms in the A.P are 23. therefore the no. middle term will be 12. Then, T12 = a + (12 - 1) × d. = a + 11d. = 213 + 11(-8). = 213 - 88. T12 = 125.

Hariom Sharma 6 years, 9 months ago

Take out first no of terms do it's half that tern

Puja Sahoo? 6 years, 9 months ago

125 which is 12th term of ap

ANSWER

A circle is inscribed in a ∆ABC ,touching BC, CA, and AB at P ,Q, R, respectively, . If AB=10 cm, AQ=7 cm, and CQ=5cm ,then find the length of BC

Posted by Afrin Hussain 6 years, 9 months ago

CBSE > Class 10 > Mathematics

2 answers

Gaurav Seth 6 years, 9 months ago

Given, a circle inscribed in triangle ABC, such that the circle touches the sides of the triangle

Tangents drawn to a circle from an external point are equal.

Afrin Hussain 6 years, 9 months ago

8

ANSWER

Euclid's division lemma aur euclid's division algorithm mai kya difference hai?? Aur trial and error in mai se konsi method ko kahte hain...??

Posted by Samyukta ... 6 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Mona Sharma ? 6 years, 9 months ago

Euclid div lemma is a proven statement used to prove a given statement or problem but euclid div algorithm is a defined series of steps used to compute HCF of given integers. Hope would help. ?

ANSWER

Find a quadratic polynomial whose zeroes are 1 and-3

Posted by Shikhar Bajpai 6 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Puja Sahoo? 6 years, 9 months ago

x sq. + 2x - 3.....

ANSWER

Prove 9AD²=7AB²

Posted by Sagar Singh 6 years, 9 months ago

CBSE > Class 10 > Mathematics

2 answers

Sahil Rajput 6 years, 9 months ago

6.5 que 15

Puja Sahoo? 6 years, 9 months ago

What's your question........?

ANSWER

Quadratic equation .formula.based

Posted by Adarsh Adarsh 6 years, 9 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Solve for x and y 7sup x + 5sup y =74. 7sup (x+1)-5sup(y+1)=218

Posted by Mansi R 6 years, 9 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Find the 18th term of AP: √2,√18,√50,√98,...

Posted by Anand Raj 6 years, 9 months ago

CBSE > Class 10 > Mathematics

7 answers

Pragati Jadav 6 years, 9 months ago

Ap= √2,√18,√50, √98 it can also be writtenin the form Ap=√2,3√2,5√2,7√2...... A=√2. D=2√2. Now, a of 18= a+( n-1 )×d. √2+17×2√2. = √2+34√2. =35√2 answer.?

Ansh Kumar 6 years, 9 months ago

Ap is in form /2, 3/2, 5/2 ........ where / means root and difference d = a2-a1 =3/2-/2 = 2/2 a=/2 d=2/2 a18= a+17d = /2 + 17×2/2 = /2 + 34/2 =35/2 = /2450

Ram Kushwah 6 years, 9 months ago

The AP can be written as:

√2 ,3 √2 ,5 √2 ,7 √2 ...

a= √2 and d=2 √2

a₁₈= √2 +17*2 √2

=(1+34) √2

=35 √2 ={tex}\sqrt 2450{/tex}

Affu 😊 6 years, 9 months ago

35√2

Aditya Mandal 6 years, 9 months ago

A=root 2 D=2 root2 N=18 Therefore applying a+(n-1)d ANSWER IS= 35root2

Puja Sahoo? 6 years, 9 months ago

35 root 2.....

Rohit Sreeram 6 years, 9 months ago

sqrt 2450

ANSWER

How to revise maths before 1 done of exam

Posted by Akash Mehra 6 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Isha Kapoor 6 years, 9 months ago

U just see the register on which u have practiced maths

ANSWER

Find HCF of 91 and 130 and express its in the form of 91x+130y.

Posted by Harsh Kumar 6 years, 9 months ago

CBSE > Class 10 > Mathematics

2 answers

Puja Sahoo? 6 years, 9 months ago

Hcf=13 and x=3, y=-2

Rohit Sreeram 6 years, 9 months ago

x=3, y= -2

ANSWER

How many three-digit numbers are division by 7.

Posted by Sahil Singh 6 years, 9 months ago

CBSE > Class 10 > Mathematics

6 answers

Shikhar Singh 6 years, 9 months ago

128 is the correct answer.

Sahil Singh 6 years, 9 months ago

Thanks

Crazy Kills Tv 6 years, 9 months ago

an = a + (n-1)d a is 105 D is 7 and an = 994 994 = 105 + (n-1)7 889÷ 7 = n-1 127 =n-1 128 = n

?#Hr_76# ? 6 years, 9 months ago

Refer to ncert ch-5 A.P

Puja Sahoo? 6 years, 9 months ago

128

Sahil Singh 6 years, 9 months ago

Ans fast.......

ANSWER

solve for x and y 44/x+ y +30/x_y=10 55/x+ y+ 40/x_y=13

Posted by Poonam Kadian 6 years, 9 months ago

CBSE > Class 10 > Mathematics

3 answers

Poonam Kadian 6 years, 9 months ago

solve this complete

Shikhar Singh 6 years, 9 months ago

The x=8 and y=3. Take x+y as v and x-y as u solve and you will get the answer.

Rohit Sreeram 6 years, 9 months ago

x=8, y=3

ANSWER

Find 10 term of an AP -1.0,-1.5,-2.0

Posted by Gaurika Makol 6 years, 9 months ago

CBSE > Class 10 > Mathematics

2 answers

Rohit Sreeram 6 years, 9 months ago

-5.5

Meet Agarwal 6 years, 9 months ago

-5.5

ANSWER

What is a+b

Posted by Piyush Toshniwal 6 years, 9 months ago

CBSE > Class 10 > Mathematics

2 answers

Heart ? Hacker 6 years, 9 months ago

Bakwas

#Miss_Raagini ???? 6 years, 9 months ago

a+b

ANSWER

Construct a triangle ABC with side BC = 7 cm angle B= 45 angle A = 105 Then construct another triangle whoose sides are 3/4 times the corresponding sides of triangle ABC

Posted by Aman Gupta 6 years, 9 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Guys tell me briefly that why (5)(7)(11) + (11) is a composite number

Posted by Garima Choudhary 6 years, 9 months ago

CBSE > Class 10 > Mathematics

3 answers

Garima Choudhary 6 years, 9 months ago

Rohit plzz tell its ans briefly

Rohit Sreeram 6 years, 9 months ago

it has 2 or more than 2 prime factors

Heart ? Hacker 6 years, 9 months ago

Out of knowledge

ANSWER

A wire is in the form of circle if radius 42cm.it is bent into a square.determine the side of the square

Posted by Praveen Kumar 6 years, 9 months ago

CBSE > Class 10 > Mathematics

2 answers

Meet Agarwal 6 years, 9 months ago

Sorry 66

Meet Agarwal 6 years, 9 months ago

67

ANSWER

√x+y=3 and x+√y=6 find x and y

Posted by S Sarswat 6 years, 9 months ago

CBSE > Class 10 > Mathematics

2 answers

Shikhar Singh 6 years, 9 months ago

This pair of equation don't have any solution.

Meet Agarwal 6 years, 9 months ago

x=3448

ANSWER

Solve the equation x2 +3x-1734 x square

Posted by Shreyansh Goyal 6 years, 9 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

The angle of elevation of aeroplane from a point on the ground is 45°after flying for 15 sec,the angle of elevation is 30° .if the aeroplane is flying at constant height of 2500m ,find the average speed of areoplane

Posted by Shaurya Dev Thakur 6 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Ayush Kumar 5 years, 8 months ago

20

ANSWER

Find the zeros of the polynomial x^2-3x-m(m+3)

Posted by Shivam Tiwari 6 years, 9 months ago

CBSE > Class 10 > Mathematics

2 answers

#Miss_Raagini ???? 6 years, 9 months ago

Ya

#Miss_Raagini ???? 6 years, 9 months ago

X^2 - 3x - m(m+3) = 0 => x^2 + mx - (m+3)x- m(m+3) = 0 => x(x+m) - (m+3)(x+m) = 0 => (x+m) (x-m-3) = 0 x = - m and m+3 Roots are - m and m+3 ??

ANSWER

Find the zeros of the polynomial x^2+x-p(p+1)

Posted by Shivam Tiwari 6 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

#Miss_Raagini ???? 6 years, 9 months ago

x2+x-p(p+1)=0 x2+(p+1)x-px-p(p+1)=0 x(x+p+1) -p(x+p+1)=0 (x+p+1)(x-p)=0 x=-p-1, p hope it will help u ??

ANSWER

Prove that (1 + sinA-cosA) ÷(1+sinA+cosA) =(1-cosA)÷(1+cosA)

Posted by Shubham Gupta 6 years, 9 months ago

CBSE > Class 10 > Mathematics

2 answers

Praveen Basera 6 years, 9 months ago

The answer of this question is too long.How I can send u

Meet Agarwal 6 years, 9 months ago

Bhai its to long how i send u

ANSWER

SINA-COSA+1/SINA+COS-1=1/SECA-TANA

Posted by Archana Yadav 6 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

#Miss_Raagini ???? 6 years, 9 months ago

LHS = (sinθ - cosθ + 1)/(sinθ + cosθ - 1) dividing by cosθ both Numerator and denominator = (sinθ/cosθ - cosθ/cosθ + 1/cosθ)/(sinθ/cosθ + cosθ/cosθ - 1/cosθ) = (tanθ + secθ - 1)/(tanθ - secθ + 1) Multiply (tanθ - secθ) with both Numerator and denominator = (tanθ + secθ - 1)(tanθ - secθ)/(tanθ - secθ + 1)(tanθ - secθ) = {(tan²θ - sec²θ) - (tanθ - secθ)}/(tanθ - secθ + 1)(tanθ - secθ) = (-1 - tanθ + secθ)/(tanθ - secθ + 1)(tanθ - secθ) [ ∵ sec²x - tan²x = 1 ] = -1/(tanθ - secθ) = 1/(secθ - tanθ) = RHS Hope it helps archana ?

ANSWER

SinA-1/CosA+SinA-1=CosecA-CosA

Posted by Bikash Kumar 6 years, 9 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

What is probability????

Posted by Balwant Singh 6 years, 9 months ago

CBSE > Class 10 > Mathematics

3 answers

Prachi Maithil 6 years, 9 months ago

Probability: how likely something is to happen Formula to find probability = favourable outcomes /total outcomes... Probability is can't be negative.....

Shabnam Khatun Naseem Ahamed Siddiqui 6 years, 9 months ago

Favorable outcomes/total putcomes

#Miss_Raagini ???? 6 years, 9 months ago

Fav. outcomes/total outcomes

ANSWER

Find the value of P such that quadratic equation ( P-12)x2-2(P-12)x+2=0 has equal root

Posted by Prateek Kumar Singh 6 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

#Miss_Raagini ???? 6 years, 9 months ago

(P -12)x² +2( P -12) x + 2 =0 have two real and equal roots so, D = b² -4ac =0 here, b = 2( P -12) a = (P -12) c = 2 now, D = {2(P -12)}² -4.2(P -12) =0 4{ (P -12)² -2( P -12) } =0 (P -12)² -2(P -12)=0 (P -12){ P -12 -2} = 0 (P -12)( P -14) =0 P = 12, 14 hence value of P = 12,14

ANSWER

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