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basic formula for trigonometry

Posted by Vinit Pandit????? 6 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

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Alpha and beta are zeroes of polynomial x²-6x+ a. Find the value of a, if 3alpha +2beta = 20

Posted by Kiran Yadav 6 years, 11 months ago

CBSE > Class 10 > Mathematics

4 answers

Vinit Pandit????? 6 years, 11 months ago

p(x)=x2-6x+a a=3alpha+2beta=20.....(1) from the quadratic expression alpha+beta=6.....(2) and alpha×beta=a.....(3) multiply eq.. (2)by 2and subtract from(1) a=20-6×2 a=20-12=8alpha substitute this value in (2) beta=6-8=-2 then( -2)is beta and( 8)is alpha then=alpha×beta =8×-2=-16 answer

1Thank You

. . 6 years, 11 months ago

Find sum of zeroes alpha+beta=-b/a u will get a value then find the value of alp.and beta with the help of given information and then find product of zroz =c/a u will get the value of a

1Thank You

Kiran Yadav 6 years, 11 months ago

How u solve this explain

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. . 6 years, 11 months ago

-16

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A solid sphere of radius 3cm is melted and then recast into small spherical balls each of diameter 0.6cm.find the number of balls

Posted by Raj Smarty 6 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Rahul Drall 6 years, 11 months ago

1Thank You

. . 6 years, 11 months ago

1000

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what is the basic formula for understand trignometry

Posted by Vinit Pandit????? 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Devansh Kanthariya 6 years, 11 months ago

Just learn the identities And change question in sin ans cos

3Thank You

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A solid sphere of radius 3cm is melted and then recast into small spherical ball each of diameter 0.6cm .find the number of balls

Posted by Vinit Pandit????? 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

. . 6 years, 11 months ago

1000

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What are the important questions from chapter areas related to circle ??

Posted by Anshika Pal???? 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Vinit Pandit????? 6 years, 11 months ago

plzz understand the table for area and perimeter then u understand all the question because in this chapter all question are important

2Thank You

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Main formulae of (chapter area related to its circle)

Posted by Riya Panwar 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Anshika Pal???? 6 years, 11 months ago

Area of the the sector of angle theta & length of an arc of a sector of angle theta

2Thank You

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(1/x+4)-(1/x-11)=11/30 Send by steps if someone is giving answer for this question

Posted by Damanjeet Kaur 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 4 months ago

we have to Solve the equation, {tex}\frac { 1 } { x + 4 } - \frac { 1 } { x - 7 } = \frac { 11 } { 30 } , x \neq - 4{/tex} ,{tex}7{/tex} for x.

Given equation, {tex}\frac { 1 } { x + 4 } - \frac { 1 } { x - 7 } = \frac { 11 } { 30 }{/tex}

or, {tex}\frac { x - 7 - x - 4 } { ( x + 4 ) ( x - 7 ) } = \frac { 11 } { 30 }{/tex}

or, {tex}( - 11 ) \times 30 = 11 ( x + 4 ) ( x - 7 ){/tex}

or, {tex}x ^ { 2 } - 3 x + 2 = 0{/tex}

or, {tex}x ^ { 2 } - 2 x - x + 2 = 0{/tex}

or, (x - 1)(x - 2 ) = 0

{tex}\therefore {/tex} x = 1, 2

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A letter is choosen at random from the probability what is the probability that the chosen letter is a vowel

Posted by Rajan Dewan 6 years, 11 months ago

CBSE > Class 10 > Mathematics

3 answers

Sunidhi??? Chauhan 6 years, 11 months ago

No of possible outcome =26 ,no of favourable outcome=5, p(getting vowels)=5/26

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Dipti Singh 6 years, 11 months ago

5/26

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. . 6 years, 11 months ago

5/26

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please.,can you send me guess paper of maths 2019 for revision of exams

Posted by Sahil Virk 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Dipti Singh 6 years, 11 months ago

You should try support material provided in govt. School.

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Full solution

Posted by Abishay Narain 6 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

How to find mode and median?

Posted by Abishay Narain 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Dolma Lhamo 6 years, 11 months ago

By using there formula.

2Thank You

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Sir/mam can you pls send the sample paper of easy maths so i can choose the sub for my board

Posted by Ruval Parekh 6 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Can anyone give me blueprint of mathematics for 2k19 boards class 10

Posted by Akash Mishra 6 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Model test paper of mathematics

Posted by Muskan Kumari 6 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

The radius and height of a solid right circular cone are in the ratio 5:12.if its volume is314 cm3 find its tsa

Posted by Avaneesh Sharma Mdjssv 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 4 months ago

Let the ratio be x
{tex}\therefore{/tex} Radius 'r' = 5x
Height 'h' = 12x
{tex}\therefore{/tex} Slant height = {tex}\sqrt { r ^ { 2 } + h ^ { 2 } } = \sqrt { ( 5 x ) ^ { 2 } + ( 12 x ) ^ { 2 } }{/tex} =13x
Now, volume = 314 m³ [given]
{tex}\Rightarrow {/tex} {tex}\frac { 1 } { 3 } \pi r ^ { 2 } h{/tex} = 314
{tex}\Rightarrow {/tex} {tex}\frac { 1 } { 3 }{/tex} {tex}\times{/tex} 3.14 {tex}\times{/tex} 25 x²{tex}\times{/tex} 12x = 314
{tex}\Rightarrow {/tex} x³ = {tex}\frac { 314 \times 3 } { 3.14 \times 25 \times 12 }{/tex}
{tex}\Rightarrow {/tex} x = 1
{tex}\therefore{/tex} Slant height = 13x = 13m
Radius = 5x = 5m

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Is there will be choice in maths paper for the students of 2018-2019?

Posted by Sonakshi Bhandari 6 years, 11 months ago

CBSE > Class 10 > Mathematics

4 answers

Prisha Rathore 6 years, 11 months ago

No.....

0Thank You

Tanya Zanzad 6 years, 11 months ago

No but an internal choice is provided pf questions from same lessons

2Thank You

Ashish ™ 6 years, 11 months ago

No, from the batch of 2019-20 this scheme works....

2Thank You

Abc . 6 years, 11 months ago

2Thank You

ANSWER

the volume of hemisphere is 2425 .5cm3 find csa

Posted by Avaneesh Sharma Mdjssv 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 6 years, 11 months ago

Volume of hemisphere = 2425.5 cu cm.
Volume of hemisphere = 2/3πr³
2425.5 = 2/3 × 22/7× r³
r³ = (2425.5 × 21)/44
r³ = 50935.5/44
r³ = 1157.625
r = 10.5 cm
Now,
Curved Surface Area of hemisphere = 2πr²
= 2×22/7×10.5×10.5
= 693 sq cm
CSA of hemisphere is 693 sq cm.

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A ladder 15 m long just reaches the top of a vertical wall. If the ladder makes an angle of 60° with the wall. Find the height of wall.

Posted by Nikita Sharma 6 years, 11 months ago

CBSE > Class 10 > Mathematics

3 answers

Yogita Ingle 6 years, 11 months ago

Let AB be the wall and AC be the ladder

We have,
AC = 15 m and ∠BAC = 60°
Cos 60° = AB/AC
⇒ 1/2 = AB/15
⇒ AB = 15/2 m

4Thank You

. . 6 years, 11 months ago

Take ladder as the hypotenuse and height of as the perpendicular and dist. bet . base of wall and ladder as the base then apply tan 60

2Thank You

Nikita Sharma 6 years, 11 months ago

I have a confusion in figure

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If cosA -sinA=√2 sinA, prove that cosA +sinA=√2sinA

Posted by Nikita Sharma 6 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Nikita Sharma 6 years, 11 months ago

I have the same problem with question

1Thank You

Anushka Jugran ? 6 years, 11 months ago

I think u have typed wrong.. May be v need to prove cosA+sinA=root 2cosA

1Thank You

ANSWER

If p is a prime number, then p is a ...... number. (fill the blank)

Posted by Dhananjay Pandey 6 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Tanisha Tanisha 6 years, 11 months ago

https://goo.gl/search/Prime+number Prime number,

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Amit Bhadauriya 6 years, 11 months ago

Integer

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Find the solution of quadratic equation x2-b2= a(2x-a)

Posted by Raghav Morya 6 years, 11 months ago

CBSE > Class 10 > Mathematics

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A,B and C do a work in 8 hrs. A alone do it in 20 hrs. B alone do it in 24 hrs. In hiw many hrs c alone do it

Posted by Deeksha Singh 6 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Mayank Gulati 6 years, 11 months ago

30 hrs

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Nandini Baloji 5 years, 8 months ago

4 hrs

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Anybody can give sample paper.

Posted by Gajal Kumawat 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Anushka Jugran ? 6 years, 11 months ago

Available in this app.. Go through previous year papers.. I can't give u here

1Thank You

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Prove that sum of angle formed betwwen tangents and formed at centre is 180

Posted by Prince Garg 6 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

. . 6 years, 11 months ago

Yes it will be done by ,angle on the tangents by the radii are 90° so 2 angles are 90+90=180 .Now remaining 2 angles which are at centre and between 2 tangents are 360-180=180. QED

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ANSWER

The root of the equation

Posted by Harsh Vardhan 6 years, 11 months ago

CBSE > Class 10 > Mathematics