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

from right angle triangle BOC,
BC² = OB² + OC²
{tex}\Rightarrow{/tex} BC² = 10² + 10²
{tex}\Rightarrow{/tex} BC² = 100 + 100
{tex}\Rightarrow{/tex} BC² = 200
{tex}\Rightarrow{/tex} BC = {tex}\sqrt{200}{/tex}
{tex}\Rightarrow{/tex} BC = {tex}10\sqrt{2}{/tex}
So, the length of the chord is {tex}10\sqrt{2}{/tex} cm.

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Any 5 important questions of trigonometry

Posted by Divya Borra 7 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Rohan Chavan 7 years, 1 month ago

Last question of the chapter and example 15 16 17 very important due to the board examination point of view

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Any one have previous question papers please ????

Posted by Divya Borra 7 years, 1 month ago

CBSE > Class 10 > Mathematics

3 answers

Raunak _ Pandey ?? 7 years, 1 month ago

U can download it from the internet

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Apurv Gautam 7 years, 1 month ago

Yes I have come to Deoli Rajasthan and take themfor photocopy

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Saurabh Singh Harariya 7 years, 1 month ago

How can I type whole paper in this

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A train takes 2 hours less for a journy of 300km if its speed is increased by 5km/h from its usual speed . Find the usual speed of train.

Posted by Avani Patidar 7 years, 1 month ago

CBSE > Class 10 > Mathematics

3 answers

Dhruv Singh 7 years, 1 month ago

Search in rs aggrawl book

1Thank You

Dharmraj Kumar 7 years, 1 month ago

1Thank You

Kunal Kalra 7 years, 1 month ago

20kmperhour

3Thank You

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Converse bpt theorem

Posted by Manish Kumar 7 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Yuvraj Singh 7 years, 1 month ago

Friend given in the book of ncert page no=126

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Anyone in Facebook please give name

Posted by Lucky Rawat 7 years, 1 month ago

CBSE > Class 10 > Mathematics

5 answers

Yuvraj Singh 7 years, 1 month ago

Rao sahab

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Omprakash Bishnoi 7 years, 1 month ago

omprakash navodayan

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Omprakash Bishnoi 7 years, 1 month ago

omprakash sinwar bishnoi

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Saurabh Singh Harariya 7 years, 1 month ago

Abhisek raina and dimple danu

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Vinay? Yadav????? 7 years, 1 month ago

Tanya tiwari

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If tan$=4/5,evaluate 3sin$+2cos$/3sin$-2cos$

Posted by Satish Tyagi 7 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Samridhi Yadav 7 years, 1 month ago

Your question is wrong as there haven't mentioned the angles. And in trigonometery angles is must to find angles

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M Adithyas Vaibhav Machiraju 7 years, 1 month ago

Tan

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(1,2) (4,y)(x,6)(3,5) are vertices of parallelogram find x and y.

Posted by Sunny Singh 6 years, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 6 months ago

Let A → (1, 2), B → (4, y), C→ (x, 6) and D→ (3, 5).
We know that the diagonals of parallelogram bisect each other.
So, Coordinates of the mid-point of diagonal AC
= Coordinates of the mid-point of diagonal BD
{tex}\Rightarrow \left( {\frac{{1 + x}}{2},\frac{{2 + 6}}{2}} \right) = \left( {\frac{{4 + 3}}{2},\frac{{y + 5}}{2}} \right){/tex}
{tex}\Rightarrow \left( {\frac{{1 + x}}{2},4} \right) = \left( {\frac{7}{2},\frac{{y + 5}}{2}} \right){/tex}
{tex}\Rightarrow \frac{{1 + x}}{2} = \frac{7}{2}{/tex}
{tex}\Rightarrow{/tex} 1 + x = 7
{tex}\Rightarrow{/tex} x = 6
and {tex}4 = \frac{{y + 5}}{2}{/tex}
{tex}\Rightarrow{/tex} y + 5 = 8
{tex}\Rightarrow{/tex} y = 3

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How we find the series of an A.P

Posted by Shambhu Badhautiya 7 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Ankeet Pandey 7 years, 1 month ago

Ap : a+d ,a2+d ,a3+d ,a4+d.........................infinite

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Amit Gupta 7 years, 1 month ago

Ap : a, a+d ,a+2d,a+3d.................infinite

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CHAPTER-4 (Exercise-4.3) Question no. 9

Posted by Neha .Class12Th 7 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Omprakash Bishnoi 7 years, 1 month ago

guide se dekh le

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How we solve root questions

Posted by Areeb Hussain Hussain 7 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Dhruv Singh 7 years, 1 month ago

If the quest is √4 ans is 2

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Avani Patidar 7 years, 1 month ago

By rationalise the root numbers

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find a quadratic polynomial whose one zero is 7 & some of the zeroes is -18

Posted by Patel Aamir 7 years, 1 month ago

CBSE > Class 10 > Mathematics

3 answers

Dhruv Singh 7 years, 1 month ago

Put formula and solve

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Dhruv Singh 7 years, 1 month ago

Alpha +beta =-18 ,albha×beta = 7

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..... ...... 7 years, 1 month ago

Check your question

3Thank You

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D=-4,a7=4 find a

Posted by Ajit Singh 7 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Ankeet Pandey 7 years, 1 month ago

Given :d=-4 and a7=4 Sol- a7=a+6d 4=a+6(-4) 4=a+(-24) therefor a=-24-4 a=-28

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Atulya Kumar 7 years, 1 month ago

Given: d=-4 and a7 =4 Therefore we can write a7=a+6d -4=a+6×4 -4=a+24 a=-24-4=-28 Hence we get a=-28

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Find 20th term from the last term of the Ap.3,8,13.......253

Posted by Noah Reji Mathew 7 years, 1 month ago

CBSE > Class 10 > Mathematics

4 answers

Ankeet Pandey 7 years, 1 month ago

158 from last term 98 from first term

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Mukul Kumar 7 years, 1 month ago

Correct answer is 158

2Thank You

Mukul Kumar 7 years, 1 month ago

98 is not from last,it is first 20th term

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Riya Susan Reji 7 years, 1 month ago

2Thank You

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X2-x-p(p+1)=0

Posted by Anupam Kumar 7 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Kunal J 7 years, 1 month ago

X + P = 1

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Compare x+a and (2k-9)x-(8-k)k+10 , find a&k

Posted by Ruman Raees 7 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

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If median and mean of the same data is 26 and 24 what is the mode of the same data.

Posted by Surbhi Bhandari 7 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Abhishek Varma 7 years, 1 month ago

Using emphirical formula, 3Median=Mode+2Mean 3(26)=mode+2(24) 78=mode+48 Mode=78-48 Mode=30

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..... ...... 7 years, 1 month ago

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Out of a few birds,one fourth the number are moving about in lotus plants;one ninth coupled withone fourth as well as 7 times the square root ofthe number move on hill; 56birds remain in vakula tree.what is the total number of birds?

Posted by Devesh Tripathi 7 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

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From the top of the hill the angles of depression of two consecutive kilometre stones due east are found to be 30 and 45. Find the height of the hill.

Posted by Faiz Ahmad 6 years, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 6 months ago

Given, AB is the hill and P and Q are two consecutive km stones.
Let the height of the hill AB be h m and
{tex}BP = x \ m.{/tex}
{tex}PQ= 1 km = 1000m{/tex}
In {tex}\Delta \mathrm { ABP },{/tex}
{tex}\tan 45 ^ { \circ } = \frac { A B } { B P }{/tex}
{tex}\therefore 1 = \frac { h } { x }{/tex}
{tex}\Rightarrow{/tex} {tex}x = h{/tex} ...(i)
In {tex}\triangle \mathrm { ABQ },{/tex}
{tex}\tan 30 ^ { \circ } = \frac { \mathrm { AB } } { \mathrm { BQ } }{/tex}
{tex}\therefore \frac { 1 } { \sqrt { 3 } } = \frac { h \mathrm { m } } { ( x + 1000 ) \mathrm { m } }{/tex} {tex}[ \because \mathrm { BQ } = \mathrm { BP } + \mathrm { PQ } = x + 1000]{/tex}
{tex}\Rightarrow{/tex}{tex}x + 1000 ={/tex} {tex}\sqrt { 3 } h{/tex}
{tex}\Rightarrow \sqrt { 3 } h = h + 1000{/tex}[Using (i)]
{tex}\Rightarrow ( \sqrt { 3 } - 1 ) h = 1000{/tex}
{tex}\Rightarrow h = \frac { 1000 } { \sqrt { 3 } - 1 }{/tex}
{tex}\Rightarrow h = \frac { 1000 ( \sqrt { 3 } + 1 ) } { ( \sqrt { 3 } - 1 ) ( \sqrt { 3 } + 1 ) }\\ = \frac { 1000 ( \sqrt { 3 } + 1 ) } { ( 3 - 1 ) } \\= \frac { 1000 ( \sqrt { 3 } + 1 ) } { 2 }\\ = 500 ( \sqrt { 3 } + 1 ){/tex}

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1×6π÷0

Posted by Sharad Rai 7 years, 1 month ago

CBSE > Class 10 > Mathematics

3 answers

Anurag Maurya 7 years, 1 month ago

Infinite

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Mumaiz Peer 7 years, 1 month ago

Infinite

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Manan Agarwal 7 years, 1 month ago

Not defined As any no. Cannot be divided by 0

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If cot teta +tan teta =x and sec teta - cos teta = y. Prove that (x square y) 2/3 =(xy square) 2/3 =1

Posted by Putta Monika 7 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Anurag Maurya 7 years, 1 month ago

Muje nahi pata

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How many term of 15,13,16 taken as the sum of 42 find doubpe answer

Posted by Vineet Kumar 7 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

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A solid is in the form of a right circular cylinder mounted on a solid hemisphere of radius 14 cm. the radius of base of cylinder is 14 cm. and the vertical height of the complete solid is 28 cm. Find the volume of the solid...................................Jus wan the ans.

Posted by Garima Demla 7 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Paythagores theorem

Posted by Manish Patel 7 years, 1 month ago

CBSE > Class 10 > Mathematics

4 answers

Nishant Ranjan 7 years, 1 month ago

https://goo.gl/search/pythagoras+theorem+statement Pythagorean Theorem | Statement and of Verification of 'Pythagoras ... Pythagorean Theorem is also known as 'Pythagoras theorem' and is related to the sides of a right angled triangle. Statement of 'Pythagoras theorem': In a right triangle the area of the square on the hypotenuse is equal to the sum of the areas of the squares of its remaining two sides.

1Thank You

Saurav Raj Roy 7 years, 1 month ago

H²=p²+b²

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Aryan Srivastava 7 years, 1 month ago

(H)^2=(B)^2+(H)^2

1Thank You

Manish Patel 7 years, 1 month ago

Ka easy trick

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Guys maths ke do paper honge kya iss year means standard level or higher level