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Prove the BPT convers theorem

Posted by D R 6 years, 11 months ago

1 answers

Take a triangle ABC with CD as parallel points on the side AB and AC. We need to prove CD||BC. By the bpt theorem we came to know that AC/CB = AD/DC let us assume on contradiction that cd is not ll to bc. If CD is not ll to BC then there must be another line which is ll to it. Let us assume that ll line as CE from C. If CE is ll to BC then AC/CB = AE/EC. On substituting bpt theorem and this we get AE/EC = AD/DC. Therefore, CE and CD is same line. Hence proved

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ANSWER

Prove that (cosecΦ - sinΦ)(secΦ - cosΦ)(tanΦ + cotΦ) = 1

Posted by Mk Raj 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Suhana Parvin 6 years, 11 months ago

(1by sin theta-sin theta) (1by cos theta- cos) (sin by cos +cos by sin) =(1-sin square theta/sintheta) (1-cos square theta/cos theta)[ (sin sq. +cos sq theta) /sin cos] =(cos sq. /sin) (sin sq. Theta/cos theta) (1/sin cos) =1

2Thank You

ANSWER

Ch triangle state and proof thales theorm

Posted by Mancool Kaur 6 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Mutyala Gayathri 6 years, 11 months ago

If there is any other way of sending pic i will send u the proof. Kk

0Thank You

Mutyala Gayathri 6 years, 11 months ago

Statement: if a line is drwn ll to 1 side of a triangle to intersect the other 2 sides in distinct points the other 2 sides are divided in the same ratio.

1Thank You

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CosecA +cosA =x find the value of cosecA -cosA

Posted by Rana Jha 6 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Rana Jha 6 years, 11 months ago

It's right

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Rishabh Jain 6 years, 11 months ago

Pls check your ques

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The height of a cone is 30 cm. A frustum is cut off from this cone by a plane parallel to the Base of the cone .if the volume of the frustum is 19/27 of the volume of the cone. Find the height of the frustum.

Posted by Diksha Chauhan 6 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Two tangents TP and TQ are drawn to a circle with centre O from an external point T. prove that angle PTQ =2OPQ

Posted by Ravi Shrivastava 6 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

The number of equations of the form ax²+bx+2=0 that can be formed if the equation have real roots (a≥2,b≤6 and a and b are positive integers) is/ are

Posted by Dhruv Chaudhari 6 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

1x+2y

Posted by Jazzy Khan 6 years, 11 months ago

CBSE > Class 10 > Mathematics

4 answers

Suhana Parvin 6 years, 11 months ago

I agree with rashi

0Thank You

Puja Sahoo 6 years, 11 months ago

Right

1Thank You

Rashi Kashyap 6 years, 11 months ago

Jazzy aap plz ek baar check kar lo ki question thik hai ya nhi,may be question incomplete hai.

1Thank You

Ananya Sharma 6 years, 11 months ago

It has no answer because in this equation two variable

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ANSWER

Use Euclid division leema to show that cube of any positive integer is of the from 9m,9m+1or9m+8

Posted by Kapil Yadav 6 years, 11 months ago

CBSE > Class 10 > Mathematics

3 answers

Rashi Kashyap 6 years, 11 months ago

According to Euclid Division Lemma, a=bq+r,b<r<0 a1=3q+0 a2=3q+1 a3=3q+2 a1=3q. (Cubing both side) (a1)3= (3q)3 (a1)3=3q×3q×3q (a1)3=(9)3q3 Let 3q3=m (a1)3=9m (a2)3=3q+1. (Cubing both side) (a2)3=(3q+1)3 (a2)3=(3q)3+2×(3q)2×1+2×3q×(1)2+(1)3 (a2)3=9(3q3+2×(3q)2+6q)+1 let 3q3+2×(3q)2+6q=m (a2)3=9m+1 a3=3q+2. (Cubing both side) (a3)3=(3q+2)3 (a3)3=(3q)3+2×(3q)2×2+2×3q×(2)2+(2)3 (a3)3=9(3q3+2×(3q)2×2+2×3q×(2)2)+8 Let3q3+2×(3q)2×2+2×3q×4=m (a3)3=9m+8 Hence proved

1Thank You

Yogita Ingle 6 years, 11 months ago

Let x be any positive integer. Then, it is of the form 3q or, 3q + 1 or, 3q + 2.

So, we have the following cases :

Case I : When x = 3q.

then, x³ = (3q)³ = 27q³ = 9 (3q³) = 9m, where m = 3q³.

Case II : When x = 3q + 1

then, x³ = (3q + 1)³

= 27q³ + 27q² + 9q + 1

= 9 q (3q² + 3q + 1) + 1

= 9m + 1, where m = q (3q² + 3q + 1)

Case III. When x = 3q + 2

then, x³ = (3q + 2)³

= 27 q³ + 54q² + 36q + 8

= 9q (3q² + 6q + 4) + 8

= 9 m + 8, where m = q (3q² + 6q + 4)

Hence, x³is either of the form 9 m or 9 m + 1 or, 9 m + 8.

</div> </div> </div>

0Thank You

Sujal Gupta 6 years, 11 months ago

Bshshshghdh

2Thank You

ANSWER

1-sin0 1+sin0

Posted by Prafull Kumar 6 years, 11 months ago

CBSE > Class 10 > Mathematics

4 answers

Vivek Sarma 6 years, 11 months ago

Ya the answer is correct. ( cos square theta).

0Thank You

Ananya Sharma 6 years, 11 months ago

0Thank You

Md Soyeb 6 years, 11 months ago

=(1-sinΦ)(1+sinΦ) =1-sin²Φ =Cos²Φ

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Chētnà Pandey✌️ 6 years, 11 months ago

What's the question bro I can't understand??

1Thank You

ANSWER

Perimeter of trangle

Posted by Himanshu Rana 6 years, 11 months ago

CBSE > Class 10 > Mathematics

4 answers

Mahak Yadav 6 years, 11 months ago

Sum of all sides of triangle

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Yogita Ingle 6 years, 11 months ago

Perimeter of polygon = addition of all sides
Perimeter of triangle = Adding all 3 sides
Perimeter of equilateral triangle= 3 × side

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Chētnà Pandey✌️ 6 years, 11 months ago

AB + BC + CA (add all three sides of ∆)

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Sapna Jain 6 years, 11 months ago

A+b+c

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ANSWER

A positive no. When divided by 88 gives the remainder 8. What would be tbe remainder when it is divided by 11?

Posted by Brinda Agarwal 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Medhavi Mishra 6 years, 11 months ago

Let the positive number be x A. T. Q., x/88=8 x=88*8=704 Then, x/11=704/11 quotient =64 and remainder =0

2Thank You

ANSWER

If 1 polynomial is divided by other polynomial and get remainder Give me a example with answer

Posted by Meraz Alam Ansari 6 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

If px squar +3x+q=0 has two roots x=-1,x=-2,find p-q

Posted by Eti Mishra 6 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Prashant Chaudhary 6 years, 11 months ago

Nice

3Thank You

Yogita Ingle 6 years, 11 months ago

px2 + 3x + q = 0
x = 1
p + 3 + q = 0
p + q = -3 .......... (i)
x = -2
p(-2)2 + 3(-2) + q = 0
4p - 6 + q = 0
4p + q = 6 ........... (ii)
Subtract (i) and (ii)
3p = 9
p = 9/3 = 3
Put it in (i)
3 + q = -3
q = -3 -3
q = -6

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ANSWER

an aeroplane flying horizontally at a height of 2500 m above the ground is observed at an elevation of 60 degree and after 15 second the elevation is observed to be 30 degree find the speed in kilometre per hour of the aeroplane

Posted by Shafi Ur Rehman 6 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Sarah purchases every year national saving certificate of value exceeding the last year purchase by rs.25 after 2o years she find the total value of certificate purchased by her is rs.7250 .find the value of certificate purchased

Posted by Yogesh Jaiwal 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Gaurav Seth 6 years, 11 months ago

Let the value of certificate purchased by Sarah in the 1st year be Rs x.

Value of certificate purchase by Sarah in the 2nd year = Rs x + Rs 25 = Rs (x + 25)

Value of certificate purchased by Sarah in the 3rd year = Rs (x + 25) + Rs 25 = Rs (x + 50) and so on.

x, x + 25, x + 50,...... are in A.P.

First term, a = x

Common difference, d = 25

Given, Total value of certificates purchased by her after 20 years = Rs 7250

∴ Value of certificate purchased by her in the 1st year = Rs 125

Value of certificate purchased by her in the 10th year, a10

∴ Value of certificate purchased by her in the 10th year = Rs 350

3Thank You

ANSWER

If the 3rd and 9th term of an Ap is 4 and -8 respectively which term of this Ap is zero

Posted by Chetna Saini 6 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Chetna Saini 6 years, 10 months ago

Please reply me

0Thank You

Gaurav Seth 6 years, 11 months ago

a+2d = 4 …(1)

a+8d = -8 …(2)

Deduct (1) from (2), to get

6d = -12, or d = -2.

From (1), a = 4–2d = 4+4 = 8.

So the numbers of the AP are- 8, 6, 4, 2, 0, -2, -4, -6, -8.

So the 5th term is zero.

3Thank You

ANSWER

Evaluate: Sin 18° _________ Cos 72°

Posted by Sakshi Saxena 6 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Chetna Saini 6 years, 11 months ago

Sin 18°upon cos 72° Sin changes to cos So ,sin(90°-18°) upon cos 72° Sin will change to cos 72 °upon cos72° Then cos 72° will cancel with cos72° The answer will be (1)

1Thank You

Pooja Nangliya 6 years, 11 months ago

Answer is zero (0)

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ANSWER

Area of the minor segment and major segment

Posted by Anshu Jaiswal 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 6 years, 11 months ago

The segment of a circle divides it into two region namely major segment and minor segment. The segment having larger area is known as the major segment and the segment having smaller area is known as minor segment.
Area of minor segment = θ/360 πr²
<nobr></nobr>Area of major segment = area of minor segment <nobr>–Area of triangle </nobr>

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ANSWER

8.2

Posted by Ravanjeet Kumar 6 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Sapna Jain 6 years, 11 months ago

Which question

0Thank You

Prashant Chaudhary 6 years, 11 months ago

Aapka question kya hai Bhai ?

3Thank You

ANSWER

The sum and product of the zeroes of a qadratic polynomial are -1/2and -3 respectevely what is the qadratic polynomial

Posted by Ashish Kumar Yadav 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Sapna Jain 6 years, 11 months ago

Formula is xsquare -(alpha +beeta)x +alpha beeta

2Thank You

ANSWER

Plzxx tell what re the imp. Questions of chapter 13

Posted by Ankita Biswas 6 years, 11 months ago

CBSE > Class 10 > Mathematics

4 answers

Amisha Sharma ? 6 years, 11 months ago

1 year

0Thank You

Prashant Chaudhary 6 years, 11 months ago

Koi bata Sakta hai mujhe ki kisko kitne din hue iss app ko use Karte

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Prashant Chaudhary 6 years, 11 months ago

Sab important questions hai Sab padho tabhi sahi hoga

1Thank You

Sapna Jain 6 years, 11 months ago

Full chapter is very important

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If the point A(a,2) is equidistant from the points B(8,-2) andC(2,-2),find the value of a

Posted by Sahil Raj 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 6 years, 11 months ago

we have that:
AB = AC
so
AB² = AC²
then:
(a-8)² + (2 + 2)² = (a-2)² + (2+2)²
a²- 16a + 64 +16 = a²- 4a + 4 +16
-16a + 64 = -4a + 4
-16a + 4a =4 - 64
-12a = -60;
12a = 60;
a = 60/12 = 5;
a = 5

The value of a is 5.

1Thank You

ANSWER

Cos - sin =✓sin prove that Cos + sin =✓sin

Posted by Syed Mohd. Najaf 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Suhana Parvin 6 years, 11 months ago

Ur question may be wrong

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ANSWER

If the diagonal and the area of a rectangle are 25 meter and 168 square meter then what is the length of the rectangle?

Posted by Maria Anna Alwin 6 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Maria Anna Alwin 6 years, 11 months ago

How is that the answer??
The options are
17m 31m 12m 24m

0Thank You

Syed Mohd. Najaf 6 years, 11 months ago

25✓2/ 2

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ANSWER

Let a sequence have 1000 zeroes.

In Step 1 to every position in the sequence we add 2.

In Step 2 to every position in the sequence we add 2.

In Step 3 to every position which is a multiple of 3 we add 2.

This continues upto 1000th step.

After the 1000th step what will be the value in the 600th position?

Posted by Maria Anna Alwin 6 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

If x and y are coordinates of the vertices of a triangle and moreover they are rational numbers then the triangle cannot be a/an ____

Posted by Maria Anna Alwin 6 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

If a/b=b/c then the value of 1/b-c + 1/b-a is ____

Posted by Maria Anna Alwin 6 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

How many ordered pairs of (x,y) integers satisfy x/15=36/y?

Posted by Maria Anna Alwin 6 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

a cylindrical tub of radius 12cm contains milk to depth of 20cm .Spherical balls of radius 0.5 cm are massed/thrown into the milk ,so that 50% of the milk comes out.Find the no. of balls.

Posted by Anupama Singh 6 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

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