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

Consider tan²theta - 1/cos²theta Tan²theta -sec²theta ....(1/cos²theta =sec²theta) identity Therefore tan²theta -sec²theta =-1...(1+tan²theta=sec²theta therefore tan²theta -sec²theta =-1) Hence proved.

0Thank You

ANSWER

A train covered a certain distance at a uniform speed .If train would have been 10km/hr faster, it would have taken 2 hours less than the scheduled time.And if the train wewre slower by 10 km/hr ; it would have taken 3 hours more than scheduled time.Find the distance covered by train.

Posted by Sirsti Sngm 6 years, 4 months ago

CBSE > Class 10 > Mathematics

3 answers

Sirsti Sngm 6 years, 4 months ago

Try 2 answer if you can

0Thank You

Sirsti Sngm 6 years, 4 months ago

Yes

0Thank You

Deepu ? 6 years, 4 months ago

This Q is given in NCERT..

0Thank You

ANSWER

How to find the zeros

Posted by Kripakanwar Parmar 6 years, 4 months ago

CBSE > Class 10 > Mathematics

4 answers

Riya Rathore 6 years, 4 months ago

First factorise the one zero and then the answer is divided by the equation and divided anwer is factorise thrn you have the zerous???? I think you understand

2Thank You

Anjali Bhosale 6 years, 4 months ago

By using splitting middle term method and D=b²-4ab formula.

2Thank You

Rishabh Kasaudhan 6 years, 4 months ago

Using splitting method and descrimnen(d)=b2-4ac

2Thank You

Manoja Singh 6 years, 4 months ago

By using middle term splitting and 'D' method

2Thank You

ANSWER

Find 2 consecutive numbers whose square have the sum 85.

Posted by ?Harshitha? Harshi 6 years, 4 months ago

CBSE > Class 10 > Mathematics

3 answers

?Harshitha? Harshi 6 years, 4 months ago

Yaa it is correct even i am getting the same answer

0Thank You

Madan M 6 years, 4 months ago

Let two consecutive number is x and( x+1) x^2 +(x+1)^2=85 x^2+x^2+2x+1=85 2x^2+2x=85-1 2x^2+2x=84 2(x^2+x)=84 x^2+x=42 x^2+x-42=0 x^2-6x+7x-42=0 x(x-6)7(x-6)=0 (x-6)(x+7)=0 x=6,-7 If x is 6 then the other number (x+1) is 7 and if x=-7 then the other number ( x+1) is -6. Prove : x=6 (6)^2+(7)^2=36+49=85 x=-7 ( -7)^2 +(-6)^2 = 49+36=85 Hence the two numbers are 6 and 7

1Thank You

Abhay Yadav 6 years, 4 months ago

My Answer is 6 and. 7 If it is right Answer then you reply me

1Thank You

ANSWER

Tan45.sin60.sec40.cos90

Posted by Uttam Diwvedi 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Abhay Yadav 6 years, 4 months ago

My Answer is. 0

0Thank You

ANSWER

Tan30°•sec45°+tan60°•sec30°

Posted by Aditya Shrivastvav 6 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Deepu ? 6 years, 4 months ago

How?

0Thank You

Ram ? 6 years, 4 months ago

Root6+6 whole divided by 3

0Thank You

ANSWER

Explain why 7×11×13+13 and7×6×5×4×3×2×1+5

Posted by Shagun Kansal 6 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Madan M 6 years, 4 months ago

a))Take 13 as common in 7×11×13+13 =13(7×11+1) =13×78 =13×13×6 So it has more than 2 factor so it is a composite number. b))Take 5 as common in 7×6×5×4×3×2×1+5 =5(7×6×4×3×2+1+1) =5(1008+1) =5×1009 Therefor it has more than 2 factor . so it is a composite number.

1Thank You

Uttam Diwvedi 6 years, 4 months ago

Firstly take 13 common and second 5 solve their equation

0Thank You

ANSWER

if 9th term of AP is -32 and sum of 11th and 13th term is -94 . find the common difference of an AP .

Posted by Ilma Parvez 6 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Sia ? 6 years, 4 months ago

Let the first term and common difference of an A.P. be a & d respectively.
n^th term of an A.P. is a_n = a + (n -1)d
Given that,

a₉= -32
{tex}\Rightarrow{/tex} a+8d= -32...(i)
Also given,
a₁₁+a₁₃= -94
{tex}\Rightarrow{/tex} (a + 10d) + (a + 12d) = -94
{tex}\Rightarrow{/tex} 2a + 22d = -94
{tex}\Rightarrow{/tex} a + 11d = -47...(ii)
Subtracting (i) from (ii).
11d - 8d = -47 - (-32)

Or, 3d = -47+32

Or, 3d = - 15
Or, d = -5
So, the common difference is -5.

1Thank You

Fun And Music Adda 6 years, 4 months ago

Common difference= -5

2Thank You

ANSWER

3/5+2/5

Posted by Amit Gupta 6 years, 4 months ago

CBSE > Class 10 > Mathematics

6 answers

Ayushi Rawat 6 years, 4 months ago

0Thank You

Manoja Singh 6 years, 4 months ago

3÷5 +2÷5= 3+2 ÷ 5= 1

0Thank You

Madan M 6 years, 4 months ago

3/5 +2/5 =(2+3)/5 =5/5 =1

0Thank You

Manav Singh 6 years, 4 months ago

3/5+2/5: the LCM of the denominator is 5 and the sum of numerator is 3+2=5 So,5/5 gives1 it means that 3/5+2/5=1

1Thank You

Gaurav Chaurasiya 6 years, 4 months ago

3/5+2/5=5/5=1

0Thank You

Himani Saini 6 years, 4 months ago

0Thank You

ANSWER

X÷2+y=0.8 and 7÷x+y/2=10

Posted by Tanishq Sharma 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 4 months ago

{tex}\frac{x}{2}{/tex} + y = 0.8
{tex}\Rightarrow{/tex} x + 2y = 1.6
{tex}\Rightarrow{/tex} x = 1.6 - 2y ...........(i)
and {tex}\frac{7}{x+\frac{y}{2}}=10{/tex}
{tex} \Rightarrow \frac{14}{2 x+y}{/tex} = 10
{tex}\Rightarrow{/tex} 20x + 10y = 14
{tex}\Rightarrow{/tex} 10x + 5y = 7 ..........(ii)
Put (i) in (ii), we get
10(1.6 - 2y) + 5y = 7
{tex}\Rightarrow{/tex} 16 - 20y + 5y = 7
{tex}\Rightarrow{/tex} -15y = -9
{tex}\Rightarrow{/tex} y = {tex}\frac{9}{15}{/tex} = 0.6
Put y = 0.6 in equation (i), we get
x = 1.6 - 2(0.6)
x = 0.4
Hence x = 0.4 and y = 0.6 is the solution of given system of equations.

2Thank You

ANSWER

Ratio of 2 in the form of of 1 ratio 3 of equation X square + m X + 12 is equal to zero find the value of m

Posted by Rekha Tomar 6 years, 4 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

A number consist of 2 digit when the number isdivided by sum of its digit the quationt is 7 the 27 is subtracted from the number the digit interchanged theseplaces find the number

Posted by Fredy M S 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Fun And Music Adda 6 years, 4 months ago

The no.is 63

0Thank You

ANSWER

Rationalize 2√2

Posted by Gautami Patil 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Fun And Music Adda 6 years, 4 months ago

It is already rationAlised

0Thank You

ANSWER

Question is que

Posted by Membership Singh 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Membership Singh 6 years, 4 months ago

Answer is answer

2Thank You

ANSWER

441/140 is a rational number with terminating expansion or not

Posted by Mohit Yadav 6 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Fun And Music Adda 6 years, 4 months ago

It is a terminating expansion with ans 3.15

0Thank You

Suyash Kumar 6 years, 4 months ago

Terminating

1Thank You

ANSWER

Prove that 2 is not equal to 0

Posted by Debargha Saha 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Prince Raj 6 years, 4 months ago

1+1=2 where 1 is greater than 0 then 2 is more greater than 0 Hence,2 is not equal to 0

1Thank You

ANSWER

value of tan A sq -1

Posted by Mohit Chaurasia 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Harsh Pahwa 6 years, 4 months ago

-sec²A

1Thank You

ANSWER

Prove that cos squared theta minus sin square theta is equal to 2 tan theta by 1 minus 10 squared theta

Posted by Kedar Mandal 6 years, 4 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Sin theta upon 1 minus cos theta + 10 theta upon 1 + cos theta equals to sec theta cosec theta + cot theta prove that

Posted by Nidhi Mishra 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Ragini Pandey 6 years, 4 months ago

Where do you live

0Thank You

ANSWER

Sin tan cos ka vastavik

Posted by Abhishek Sahare 6 years, 4 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

3+2 y = k

Posted by Girraj Rajput 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Harsh Pahwa 6 years, 4 months ago

Put y= 1 then k=5 and if we put y=2 yhen k=7

0Thank You

ANSWER

भाज्य bhajya sankhya Kise kehte hain

Posted by Shivam Sharma 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Shivam Sharma 6 years, 4 months ago

You ask me

5Thank You

ANSWER

what is quadratic formula ?

Posted by Kamal Kumar 6 years, 4 months ago

CBSE > Class 10 > Mathematics

3 answers

Kamal Kumar 6 years, 4 months ago

-b+_|b^2-4×a×b÷2a

0Thank You

Rishu Kumar 6 years, 4 months ago

_b+√d/2a _b-√d/2a

0Thank You

Gopinath Messi 6 years, 4 months ago

-b±|b^2-4ac/2a

1Thank You

ANSWER

Whats ur brainly i'd

Posted by Diljani . 6 years, 4 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

1/cosecA -cot A -1/sin A =1/sin A -1/cosec A +cot A

Posted by Srinivasan Srinivasan 6 years, 4 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Crogruence of triangle

Posted by Shashwat Lingayat 6 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Adarsh Singh 6 years, 4 months ago

Angle sides are equal

0Thank You

Gopinath Messi 6 years, 4 months ago

Angles ,sides is equal

0Thank You

ANSWER

Factorise 12( 4x - 1/4x)^2 + 5(4x - 1/4x) -2

Posted by Sabitha D 6 years, 4 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Hwo proov that root 2 is a irrational number

Posted by Renu Rekwar 6 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Rishu Kumar 6 years, 4 months ago

Let,√2=p/q Squares both side,so we found 2=p2/q2 Multiplying q both sides 2q=p2/q2×q=2q=p2/q Since p and q are integer so it is rational and his friction is 1 .so it is not rational So it is rational

0Thank You

Itika Singhal 6 years, 4 months ago

How! and prove! Is the correct spelling

1Thank You

ANSWER

Ncrt 12.3 exercise

Posted by Dsf Hvf 6 years, 4 months ago

CBSE > Class 10 > Mathematics