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3cotq=4 then cotq=4/3 now, putting the value of cotq in a right angled triangle we get hypotenuse =5 [by pythagoras theorem] now find the value of cosq and sinq cosq=4/5 , sinq =3/5 now putting this value n the equation we get, =>4*4/5-3/5//2*4/5+3/5 =>16/5-3/5//8/5+3/5 [multipling 4*4/5 in numerator and 2*4/5 in denomiator] =>13/5 //11/5 =>13/5*5/11 =>13/11

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ANSWER

Tan theta+1/tan theta-sin theta=sec theta+1/sec theta-1

Posted by Vartika Pandey 5 years, 2 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Five year ago Nuri was thrice as old as sonu 10 year later he will be twice as old as Sonu how old are sonu and nuri

Posted by Sejal Thakur 5 years, 2 months ago

CBSE > Class 10 > Mathematics

2 answers

Sejal Thakur 5 years, 2 months ago

???

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Yogita Ingle 5 years, 2 months ago

Let the present age of Nuri =x year

And present age of Sonu =y year

Five years ago

Age of Nuri =x–5years

Age of Sony =y–5years

Nuri was thrice as old as Sonu

X−5=3(y–5)

X–5=35–15

X–3y=−15+5

X–3y=−10 ………..(1)

Ten years later,

Age of Nuri =x+10

Age of Sonu =y+10

Nuri will be twice as old as Sonu.

X+10=2(y+10)

X+10=2y+20

X–2y=10 ………..(2)

X–3y=−10 ………..(1)

Subtracting equation (1) from equation (2) we get

Y=20

Plug this value in equation first we get

X−3∗20=−10

X=60–10

X=50

Hence age of Nuri =50 years and age of Sonu =20 years

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ANSWER

Five year ago Nuri was thrice as old as sonu 10 year later he will be twice as old as Sonu how old are loading and

Posted by Sejal Thakur 5 years, 2 months ago

CBSE > Class 10 > Mathematics

4 answers

Sejal Thakur 5 years, 2 months ago

Who are to say this question are wrong

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Sejal Thakur 5 years, 2 months ago

Woh are you?

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Neha Kakkar ?? 5 years, 2 months ago

Okay.

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Sejal Thakur 5 years, 2 months ago

This question wrong

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ANSWER

Short explanation of chapter 14 statistics

Posted by Moksha Maheta 5 years, 2 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

What is table of 2

Posted by Rahul Saini 5 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Malaika Sharma 5 years, 2 months ago

2×1=2 2×2=4 2×3=6 2×4=8 2×5=10 2×6=12 2×7=14 2×8=16 2×9=18 2×10=20

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ANSWER

Following real no are expressed in decimal form.find whether they are rational or not.if rational,express them in the form p/q is 5.781

Posted by Palak Arora 5 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Kruti Sojitra 5 years, 2 months ago

Rational

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Q2. Find the coordinates of the points of trisection (i.e., points dividing the line segment, in three equal parts) of the line segment joining the points (2, -2) and (-7, 4).

Posted by Harsh Gupta 5 years, 2 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

show that the points a(0,0),b(3,0),c(4,1) and d(1,1) form a parallelogram

Posted by Harsh Gupta 5 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Payal Kundarä 5 years, 2 months ago

By using distance formula √( X2 -X1)² + (Y2 -Y1)²

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If the roots of 2x^2+5px+7q=0 are resiprocal then find q

Posted by Deepa Barik 5 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Ram Kushwah 5 years, 2 months ago

2x²+5px+7q=0

Let the roots are a and 1/a

Product of roots=a*1/a=1

so 7q/2=1

So q=2/7

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ANSWER

Express sinA in term of tanA

Posted by Omprakash Yadav 5 years, 2 months ago

CBSE > Class 10 > Mathematics

2 answers

Anshuman Omm 5 years, 2 months ago

SinA=TanA *CosA

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Anshuman Omm 5 years, 2 months ago

SinA =TanA/cosA

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ANSWER

▶️ DRAWING WITH RSS KO SUBSCRIBE KARE ▶️ YOUTUBE PAR

Posted by Sonu Jha 5 years, 2 months ago

CBSE > Class 10 > Mathematics

3 answers

Riya Philip 5 years, 2 months ago

Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ?

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Adarsh Awasthi 5 years, 2 months ago

Ghanta lala

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Sonu Jha 5 years, 2 months ago

THANKS FOR SUBSCRIBING THE CHANNEL.?????

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Que 3 of ex 7.2 class 10 maths

Posted by Saniya Patil 5 years, 2 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

X/a+y/b=a+b,x/a2+y/b2=2 find the value of x and y

Posted by Yash Chaudhary 5 years, 2 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

How many three digit numbers are divisible by 7

Posted by Anshu Yadav 5 years, 2 months ago

CBSE > Class 10 > Mathematics

5 answers

Mahendra Pal 5 years, 2 months ago

Three digit number are100 to 999 105,112,119.......994 Ans:128

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Anshul Agarwal 5 years, 2 months ago

128

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Arpit Bhardwaj 5 years, 2 months ago

By Euclid divisor lemma -: 999 / 7= 142*7+5 Here 999 is a divident 7 is quoent 142 is divisor 5 is reminder So 7 number is 999-5= 994 (You know that higest nois 3 digit is 999 )

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Krishan Rangi 5 years, 2 months ago

128

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Riya Sharma 5 years, 2 months ago

The first 3-digit number which is divisible by 7 is 105 The last 3-digit number which is divisible by 7 is 994 The list of 3-digit numbers divisible by 7 are 105, 112, 119,…..994 which forms an A.P Consider a formula T(n) = a + (n – 1)d Where a = 105 d = 7 T(n) = 994 994 = 105 + (n – 1)7 889 = 7n – 7 7n = 896 n = 128 ∴ There are 128 3-digits number which are divisible by 7

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ANSWER

Solve the equations x=4 and 2x+3y=14 by substitution method

Posted by Khumpui Debbbarma 5 years, 2 months ago

CBSE > Class 10 > Mathematics

5 answers

Shubham Saxena ???? 5 years, 2 months ago

X= 4 ,, y = 2

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Kruti Sojitra 5 years, 2 months ago

2(4)+3y=14,3y=14-6,3y=12,y=12/3=4

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Anshul Agarwal 5 years, 2 months ago

3-1

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Satyam Verma 5 years, 2 months ago

Y=2

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Khumpui Debbbarma 5 years, 2 months ago

Ansew

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ANSWER

Prove that 3+√5 is irratonal

Posted by Khumpui Debbbarma 5 years, 2 months ago

CBSE > Class 10 > Mathematics

3 answers

Malaika Sharma 5 years, 2 months ago

Let us assume 3+root 5 to be rational.It means that it can be written in the form of p/q where p and q are coprime and q is not equal to zero L.H.S *p/q=3+root5 *p/q-3=root5 L.H.S i.e.p/q-3 is rational but R.H.S i.e. root 5 is irrational So our assumption is wrong Therefore 3+root5 is irrational.

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Anshul Agarwal 5 years, 2 months ago

Hence proved

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Riya Sharma 5 years, 2 months ago

Let us assume that 3+5 is a rational number. Now, 3+5=ba [Here a and b are co-prime numbers] 5=[(ba)−3] 5=[(ba−3b)] Here, [(ba−3b)] is a rational number. But we know that 5 is an irrational number. So, [(ba−3b)] is also a irrational number. So, our assumption is wrong. 3+5 is an irrational number. Hence, proved.

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ANSWER

Diagonals of a trapezium ABCD with AB DC intersect each other at the point O. If AB = 2CD, find the ratio of the areas of triangles AOB and COD.

Posted by Riya Sharma 5 years, 2 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

7.3

Posted by Kajal Kumari 5 years, 2 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Sum and value means??????

Posted by Vishnupriya Ravi 5 years, 2 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

5x - y - 7 = 0 ; x - y + 1 = 0

Posted by Simaran Nikam 5 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Riya Sharma 5 years, 2 months ago

x,y}={2,3

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ANSWER

If (4, p) and (1, 0) are end points of diameter of a circle of length 10 cm find the centre of circle

Posted by Anuj Rana 5 years, 2 months ago

CBSE > Class 10 > Mathematics

1 answers

Sir Ji 5 years, 2 months ago

Regards Chris

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ANSWER

If the graph of a polynomial intersects the x-axis at exactly two points, then it- 1- cannot be a linear or a cubic polynomial 2- can be a quadratic polynomial only 3- can be a cubic or quadratic polynomial 4- none

Posted by Abhishek Singh Gurjar X-B Roll No.-02 5 years, 2 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

The sum of third and the seventh terms of an AP is6 and their product is 8.Find the sum of first sixteen terms of the ap

Posted by Pradeep Balgar 5 years, 2 months ago

CBSE > Class 10 > Mathematics

3 answers

Yogita Ingle 5 years, 2 months ago

Let a and d be the first term and common difference of AP

nth term of AP

a_n=a+(n−1)d

∴a₃=a+(3−1)d=a+2d

a₇=a+(7−1)d=a+6d

Given a₃+a₇=6

∴(a+2d)+(a+6d)=6

⇒2a+8d=6

⇒a+4d=3....(1)

Also given

a₃×a₇=8

∴(a+2d)(a+6d)=8

⇒(3−4d+2d)(3−4d+6d)=8 [Using (1)]

⇒(3−2d)(3+2d)=8

⇒9−4d²=8

⇒4d2=1

⇒d²=1/4

⇒d=± 1/2

When d=1/2

a=3−4d=3−4×(1/2) =3−2=1

When d=−1/2

a=3−4d=3+4×(1/2) =3+2=5

When a=1 & d=21

S₁₆=216[2×1+(16−1)×21]=8(2+215)=4×19=76

When a=5 & d=−21

S₁₆=216[2×5+(16−1)×(−21)]=8(10−215)=4×5=20

Thus, the sum of first 16 terms of the AP is 76 or 20.

0Thank You

Dharanyaa Senthamizh 5 years, 2 months ago

Triangle

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Mayank Singh 5 years, 2 months ago

1.33

1Thank You

ANSWER

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